Top 22 Best Drill Bit Stainless Steels

 

1. Preamer

Set of 3 HSS6542 M2 Steel Spiral Groove Unibit Step Drill Bits Set for Stainless Steel Metal Wood Hole Cutting Tool

Set of 3 HSS6542 M2 Steel Spiral Groove Unibit Step Drill Bits Set for Stainless Steel Metal Wood Hole Cutting Tool

You can use water to cooling it when it is work and it can be used for even longer M2 high speed steel makes it last longer than others ensures easily cut through stainless steel sheets aluminum sheets copper plastic wood board and many other types of sheet metal with ease and it can automatically deburr holes while drilling to keep the drill bit clean 4mm to 32mm 15 steps 4mm to 12mm 9 steps4mm to 20mm 9 steps 4mm 6mm 8mm 10mm 12mm 14mm 16mm18mm20mm

Meet your demands with the step drill bits we offered you can process different kinds of diameter holes which greatly saves you a lot of troubleGreat for metal wood plastic countersunk Suitable for home diy and general building engineering use Easily drills on iron sheets stainless steel sheets steel sheets as well as aluminum sheetsRevolutionarysuit for use in hardness under 28 artifactssuch as stainless steel iron plate aluminum wood

 

2. HYMNORQ

Hymnorq 5/16 Inch Fractional Size M35 Cobalt Steel Twist Drill Bit Set of 5pcs, Jobber Length and Straight Shank, Extremely Heat Resistant, Suitable for Repeated Drilling in Stainless Steel

Hymnorq 516 Inch Fractional Size M35 Cobalt Steel Twist Drill Bit Set of 5pcs Jobber Length and Straight Shank Extremely Heat Resistant Suitable for Repeated Drilling in Stainless Steel

Self centering the 135quickcut pilot split points are selfcentering and can penetrate quickly with less pressure The bits will not walk or wander Straight shank allows for firmly holding and accurate centering fit for standard drill chucks and regular round collet chucks Downloadable user guide weve summed up some tips of drilling metals including a rpm chart for several common metals based on our reviews and some articles on the internet In most cases our customers would get a much better result with these tips Welcome to download

Cobalt steel manufactured from m35 grade cobalt steel with molybdenum and cobalt added to creates a hardened alloy measuring rockwell hardness up to 67 for much faster cutting and extra longer life span with up to twelve times when compared with an average hss drill bit

For metalworking particularly successful in cutting through hard metalshardness less than hrc38 such as stainless steel and cast iron although they can be used for softer materials like copper and aluminium too Not for hardened steel high carbon steel Try to adjust the rpm when it fails to penetrate

5pc set the set includes 5pcs of 516 diameter m35 grade cobalt steel twist drill bits packed in a plastic casefor easy storage and carrying Manufactured to german din338 standard

 

3. STROTON

STROTON 4-32mm Metric 6% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)

STROTON 432mm Metric 6 Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)

432mm 15 steps 4mm6mm8mm10mm12mm14mm16mm18mm20mm22mm24mm26mm28mm30mm32mm Grinding the cutting edge three timeswith the high hrc and heat resistance of the materialdesigh for cutting through stainless steel iron plate aluminumductswoodpvc and plastic Premium m35 6 cobalt steel 6669 hrc rockwell hardness scale usually give the best heatwear and chip resistance and long tool life

This cobalt step drill bit is typically capable of running two to three times fasterDespite the higher pricethe cost per hole when using cobalt drill bit will be the lowestsince it can produce so many more holes

 

4. uxcell

uxcell Cemented Carbide Twist Drill Bits 14mm Metal Drill Cutter for Stainless Steel Copper Aluminum Zinc Alloy Iron 2 Pcs

uxcell Cemented Carbide Twist Drill Bits 14mm Metal Drill Cutter for Stainless Steel Copper Aluminum Zinc Alloy Iron 2 Pcs

Features milled uflutes with deepcut spiral delivers fast material removal Suitable for drilling in tough metal including heavyduty abrasive alloy and hardened steel Round shank design round shank twist drill bit can work with a electric drill excluding in the item Use note please use low speed when drilling and note the temperature of carbide tip is not too high for extending drill bit life

Cemented carbide tip 14mm twist drill bits are made of cemented carbide tip for long service life more sharp and durable than others Use for drilling clean accurate holes in sheet metal steel copper brass aluminum plastic wood stainless steel and cast iron

 

5. M MIMHOOY

M MIMHOOY 3mm / 0.118″ Cobalt Drill Bit Set (10 Pcs), M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal

M MIMHOOY 3mm  0118 Cobalt Drill Bit Set (10 Pcs) M35 Cobalt Twist Drill Bits for Stainless Steel and Hard Metal

Cobalt drill bits manufactured from m35 grade cobalt steel measuring rockwell hardness up to 67 increases wearresistance and durability fast and sharp cutting than other bits like 4241 hss bit titanium drill bits With up to twelve times when compared with an average hss drill bit Precision ground these bits are fully ground so that its cutting diameter is seriously accurate and the lifespan is prolonged in comparison to nonground alternativesroll forged bits Smooth bit surface allows for nice clean holes

Package including 10 x 3mm diameter cobalt twist drill bits in a plastic box for easy storage and organizing Total lenght 24 inch working length 13 inch Kindly note not for glass or ceramic materials Not for high carbon steel and heattreated steel Pay attention to speed pressure and heat control during drilling

For hardened material m35 cobalt hss bit is more suitable for hardened material Particularly successful in cutting through hard metals such as stainless steel and cast iron they also can be used for softer materials like wood aluminum alloy Other drill bits can used for softer materials but cant use in cutting stainless steel

 

6. HIDOTOL

HIDOTOL Cobalt Drill Bit Set 15 PCS – M35 High Speed Steel Twist Jobber Length Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, Plastic and Wood with Indexed Storage Case, 1/16″-3/8″

HIDOTOL Cobalt Drill Bit Set 15 PCS  M35 High Speed Steel Twist Jobber Length Drill Bits for Hardened Metal Stainless Steel Cast Iron Plastic and Wood with Indexed Storage Case 11638

100 satisfaction guarantee if you are not fully satisfied with our product for any reason please feel free to contact us we will try our best to serve you Widely used m35 cobalt high speed steel is more suitable for tough high tensile strength material Particularly successful in cutting harden metals such as stainless steel cast iron high temperature alloy titanium alloy hard plastics and woods and it also can be used for softer materials High quality material high speed steel m35 cobalt 5 provide extended tool life compared to ordinary drill bits when drilling hard materials

Characteristics 135 split point with round straight shank selfcentering prevent walking make drilling precise and faster Fully ground twist design helps clear particles faster decreases friction and heat for a cooler drilling performance Specifications set of 15pcs jobber length drill bits includes 116 2pcs 564 2pcs 332 2pcs 764 1pc 18 1pc 964 1pc 532 1pc 1164 1pc 316 1pc14 1pc 516 1pc 38 1pc

 

7. Lichamp

Lichamp 1/2″ HSS Cobalt Drill Bits 5PCS with Three Flute for Hard Metal, Hardened Stainless Steel and Cast Iron

Lichamp 12 HSS Cobalt Drill Bits 5PCS with Three Flute for Hard Metal Hardened Stainless Steel and Cast Iron

4x lifespan material made from industrial grade m35 highspeed steel with 5 cobalt provides hardness for wear resistance withstands max 1100 degreef Unique 3x flute design lichamp three flute patent design drill bit clears chips and particles faster provide you with more efficient drilling experience Multiple application ideal for drilling in heavyduty tough metal including hard abrasive alloy metal hardened stainless steel or cast iron

Smoothly drilling 135degree split point tip twist design increases cutting speed with selfcentering and prevents skating starts or walking 12 cobalt drill bit round straight shanks include 5 pack 12inch diameter hss drill bit with well organized clear ps case

 

8. Drill Hulk

1/4-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12

14Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal Stainless Steel Pack of 12

Can be repeatedly sharpened as needed cobalt drill bits hardness is uniform throughout the entire material so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits Made from highspeed steel and 5 cobalt improve much higher heat resistance because of cobalt steels high red hardness provide strong durable performance compared to typical hss drill bits Application best used for drilling in hard metal including stainless steel

Jobber length 14inch cutting diameter 234inch flute length 4inch overall length 135 degree split point 3flat shank Include 12 pieces of 14inch cobalt drill bits with case

 

9. HYMNORQ

Hymnorq Step Drill Bit for Stainless Steel and Iron, M35 Grade Cobalt Steel, Double Spiral Flutes, 1/4 Inch Hex Shank, 9 Metric Steps from 4mm to 12mm, Unibit for Drilling Holes in Metal Sheet

Hymnorq Step Drill Bit for Stainless Steel and Iron M35 Grade Cobalt Steel Double Spiral Flutes 14 Inch Hex Shank 9 Metric Steps from 4mm to 12mm Unibit for Drilling Holes in Metal Sheet

For stainless steel ideal for drilling new holes or and enlarging existing holes on stainless steel as well as softer metals like iron brass copper aluminum etc Cobalt steel manufactured from solid m35 grade cobalt steel with 5 cobalt added to create a hardened heatresistant alloy for much faster cutting and extra long life span 14 hex shank compared to bits with round shanks this 14 hexshank step bit can be gripped more tightly by compatible drills and screwdrivers for greater torque

9 steps the step bit comes with 9 sizes ranging from 4mm to 12mm so you can drill up to 9 holes of different diameters with one bit saving you time and efforts to change bits Good performance the dualflute design provides greater speed and control along with jamfree performance The faststart nowalk tip allows you to drill without a center punch

 

10. MACXCOIP

Hex Shank Drill Bit Set, HSS M2 Twist Drill Bit, Especially for Stainless Steel, Sheet Metal, Wood, Plastic, Quick Change Design (1/16″ – 1/4″mm 13Pcs)

Hex Shank Drill Bit Set HSS M2 Twist Drill Bit Especially for Stainless Steel Sheet Metal Wood Plastic Quick Change Design (116  14mm 13Pcs)

Organized holder each bit has an assigned hole in a drill bit holder with size indexing for easy storage and quick organization Titanium coating classic hss m2 construction with titanium coating for capability and durability The cutting edge is hardened and honed for sharpness and features a chatterfree design with staggered cutting teeth to ensure precise countersinking and clean smooth holes Includes size 13 sizes 116 564 332 764 18 964 532 1164 316 1364 732 1564 14

Quick change 14inch hex shank fits into all 14 hex shank power drills easily and securely and made for locking into a quickchange chuck Suitable suitable for stainless steel wood carbon steel sheet steel fiberboard rubber plywood pvc plastic etc

 

11. STROTON

Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)

Metric M42 8 Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm10mm19pcs)

3 steps desigh for cutting through stainless steelhard metalsaluminumplastic Premium m42 8 cobalt steel 6870 hrc rockwell hardness scale usually give the best heatwear and chip resistance and long tool life 19pcs 135 degree split point drill bits includes 1mmlength 34cm 15mm 2mm 25mm 3mm 35mm 4mm 45mm 5mmlength 85cm 55mm 6mmlength 9cm 65mm 7mm 75mm 8mmlength 115cm 85mm 9mm 95mm 10mmlength 13cm dia 05mm increments This cobalt drill bit is typically capable of running three to five times fasterDespite the higher pricethe cost per hole when using cobalt drill bit will be the lowestsince it can produce so many more holes

The sufficiently sharp bit edge can cut the metal material into long strips of iron chips rather than slowly grinding throng the material with a blunt drill bit

 

12. ASNOMY

ASNOMY 6PCs Large Size Drill Bit Hole Saw Set 22-65mm, Tungsten Carbide Steel Tooth Hole Saw Tooth Cutter Drill Bits Hole Saw Kit for Plastic, Stainless Steel, Metal, Wood, with Storage Bag

ASNOMY 6PCs Large Size Drill Bit Hole Saw Set 2265mm Tungsten Carbide Steel Tooth Hole Saw Tooth Cutter Drill Bits Hole Saw Kit for Plastic Stainless Steel Metal Wood with Storage Bag

Large sizeinclude 22mm30mm35mm45mm50mm65mmeach hole cutters are individually cased in plastic box and each bit is also oiled prevent rust Top qualitymade from high quality cemented carbide ensuring its high hardness rust proof sturdy and durable Commitment product quality problems can be unconditional full money refund within lifetime Multipurpose toolsthis hole saw set apply to bench drill magnetic drill gun drill drill percussion and so on Perfect for stainless steel plate square tube iron cast iron wood fRP and other general sheet metal

High precision and easy to use tungsten carbide steel teeth for fast cutting of clean round holes Suitable for hand held electric drill stand motordriven drilling machine and mobile ribbon type magnetism drilling machine

 

13. General Tools

General Tools 24 Fractional Drill Gauge, Hobby Drill Gauge for 1/16” to 1/2″ Size Bits, Stainless Steel

General Tools 24 Fractional Drill Gauge Hobby Drill Gauge for 116 to 12 Size Bits Stainless Steel

238 x 634 overall 29 measuring holes identified drill bits from 116 inch to 12 inch in 164th increments Identifies drill bits sizes helpful when working with older unmarked drill bits and bits too small to fit diameter markings 238 x 634 overall Durable made from heavy duty rustproof stainless steel No math shows drill sizes in both inches and decimal equivalents

Etched markings black graduations to give high contrast and will not wear off

 

14. CaRoller

CaRoller Drill Bit Set – M35 Cobalt Drill Bit – 15 Pcs High Speed Steel Twist Jobber Length Drill Set 1/16″-3/8″ for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic with Round Shank , Plastic box Storage

CaRoller Drill Bit Set  M35 Cobalt Drill Bit  15 Pcs High Speed Steel Twist Jobber Length Drill Set 11638 for Hardened Metal Stainless Steel Cast Iron Wood and Plastic with Round Shank  Plastic box Storage

High quality material m35 cobalt high speed steel provide extended tool life compared to ordinary drill bits when drilling hard materials Twist design characteristics 135degree splitpoint and twist design reduce feed pressure for easier penetration improve cutting speed Gold oxide finish and round straight shanks precision fully ground Selfcentering prevent walking helps clear chips and debris faster Organized holder the 15 pcs set include the drill bit holder with size index for easy storage and organizing Drill bit set is suitable for most brands on the market Reliable quality and considerate service If you have any questions please feel free to contact us we will do our best to serve you

Specifications drill bit set 15 pcs cobalt jobber length drill bit set include 116x2pcs 564x2pcs 332x2pcs 764 18x2pcs 532 1164 31614 51638

Widely used m35 cobalt high speed steel is more suitable for tough high tensile strength material Particularly successful in cutting harden metals such as stainless steel cast iron high temperature alloy titanium alloy hard plastics and woods and it also can be used for softer materials

 

15. OXMUL

Industrial Grade OXMUL Step Drill Bit for Metal, 1/8 to 1/2, Coated M2 HSS, Heavy Duty for Stainless Steel, Mild Steel, Metal, Aluminum, Wood, Copper,13-Steps.2-Spiral-Flute #202

Industrial Grade OXMUL Step Drill Bit for Metal 18 to 12 Coated M2 HSS Heavy Duty for Stainless Steel Mild Steel Metal Aluminum Wood Copper13Steps2SpiralFlute 202

Cuttingoilno water cutting oil must be poured during work for longer life Prohibit watercooling to prevent rust 118split point split point tip prevents walking gets fast starts and eliminates the need for pilotstarting hole Coated m2 hss cutting test 15mm thick 304 stainless steel square pipe This premium stepped bits successfully get 35pcs 38 holes Heavy duty for stainless steel the premium tiaincoated m2 hss can cut 8x holes of regular drill bit4241 hss the hole saw bit is specially used for stainless steel mild steel metal galvanized steel aluminum iron wood pvc and copper If youre drilling a lot of metal then please trust this step drill bitthe cutting bit can produce many holes and gives long tool life

13steps2spiral flute14 triflatted shank 13steps 185323167321493251611323813327161532 to 12 2spiral flute clears chips faster 14triflatted shank fits into power tools chuck securely and eliminates slip

 

16. HYMNORQ

Hymnorq 17/64 Inch Dia. x 4.13 Inch Long M35 Cobalt Steel Twist Jobber Drill Bits 5Pcs Pack, 135 Degree Split Point, Extremely Heat Resistant, for Stainless Steel and Cast Iron

Hymnorq 1764 Inch Dia x 413 Inch Long M35 Cobalt Steel Twist Jobber Drill Bits 5Pcs Pack 135 Degree Split Point Extremely Heat Resistant for Stainless Steel and Cast Iron

Self centering the 135quickcut pilot split points are selfcentering and can penetrate quickly with less pressure The bits will not walk or wander Straight shank allows for firmly holding and accurate centering fit for standard drill chucks and regular round collet chucks Cobalt steel manufactured from m35 cobalt steel with molybdenum and cobalt added to create a hardened heatresistant alloy measuring rockwell hardness up to 67 for much faster cutting and extra longer life span with up to twelve times compared with an average hss drill bit

For metalworking particularly successful in cutting through hard metalshardness less than hrc38 such as stainless steel and cast iron although they can be used for softer materials like copper and aluminium too Not for hardened steel high carbon steel Try to adjust the rpm when it fails to penetrate

5pc 1764 fractional inch bits the set includes 5pcs of m35 cobalt steel twist drill bits well orgnized in a tough pvc case for easy storage Total length 413 working length 287 Manufactured to german din338 standard

Downloadable user guide weve summed up some tips of drilling metals including a rpm chart for several common metals based on our reviews and some articles on the internet In most cases our customers would get a much better result with these tips Welcome to download

 

17. COMOWARE

COMOWARE Cobalt Drill Bit Set – 13Pcs M35 High Speed Steel Twist Jobber Length Drill Bit for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic, 1/16″-1/4″

COMOWARE Cobalt Drill Bit Set  13Pcs M35 High Speed Steel Twist Jobber Length Drill Bit for Hardened Metal Stainless Steel Cast Iron and Wood Plastic 11614

Hss with 5 cobalt durable higher heat abrasion resistance High speed steel m35 construction with amber finish for proven capability and durability Precise 135 split point twist design 135 split point prevents walking and slippery increasing cutting speed and penetrates hard material without a pilot hole Professional widely use m35 cobalt hss is more suitable for hardened material Particularly successful in cutting through hard metals such as stainless steel cast iron high temperature alloy titanium alloy hard plastics and woods and also can be used for softer materials

Easy to carry this drill bits set fits the majority of power drill currently on the market and come with a portable plastic bag for easy storage and organization

All sizes you need 13 most commonlyused sizes 1165643327641896453211643161364732156414 to satisfy all your needs

 

18. ZELCAN

ZELCAN Cobalt Added M35 Step Drill Bit, Spiral Step Drill Bit, Unibit Drill Bit for Cutting Drilling Holes On Stainless Steel, Steel, Metal Sheet, Multiple Hole Stepped Up Bit for Professionals

ZELCAN Cobalt Added M35 Step Drill Bit Spiral Step Drill Bit Unibit Drill Bit for Cutting Drilling Holes On Stainless Steel Steel Metal Sheet Multiple Hole Stepped Up Bit for Professionals

One bit for all every bit comes with 10 sizes so you can drill up to 10 holes with different diameters saving you time and efforts to change bits every package comes with 5 bits that makes it 50 diameters in total Universal compatibility designed for drilling on steel sheets up to 008 in Acrylic pvc and wooden boards up to 02 in Marked with obvious marks for easy and precise hole drilling compatible with drills 143812 Jamfree performance dualflute design and threesided shank design is optimized for cordless drills in high speed provides greater speed and control while minimizing steel scurf flying around to lengthen service life please do not set drilling speed at its maximum to avoid damage to the cutting edge

Durable sturdy wcobalt added solid m35 molybdenum high speed construction with cobalt added for extra durability close to impossible to snap compared conventional drill bits the unique 3sided shank prevents slip in drill chuck and reduces shocks oiling the bits recommended before every use to maximize the service life

 

19. COMOWARE

COMOWARE Cobalt Drill Bit Set- 15Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case, 1/16″-3/8″

COMOWARE Cobalt Drill Bit Set 15Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal Stainless Steel Cast Iron and Wood Plastic with Indexed Storage Case 11638

High quality material 5 cobalt high speed steel m35 provide extended tool life compared to ordinary drill bits Durable and strong Professional widely use m35 cobalt hss is more suitable for hardened material Particularly successful in cutting through hard metals such as stainless steel cast iron high temperature alloy titanium alloy hard plastics and woods and also can be used for softer materials 100 satisfaction guarantee if you are not 100 satisfied with your purchase for any reason whatsoever simply please feel free to contact us

Twist design performance precise 135split point gold oxide finish and round straight shanks Prevent walking clear chips and particles fasterProduced by precision fully ground which ensures chips move smoothly Size included 15pcs jobber length drill bit set with plastic storage case including sizes 116 2pc564 1pc 332 2pc764 1pc18 2pc 964 1pc 532 1pc 316 1pc 732 1pc 14 1pc 516 1pc 38 1pc

 

20. Chiloskit

Chiloskit M35 Cobalt Spiral Grooved Industrial Unibit Step Drill Bits Stainless Steel Metal Woodworking Hole Drilling Tool Bit, Set of 5

Chiloskit M35 Cobalt Spiral Grooved Industrial Unibit Step Drill Bits Stainless Steel Metal Woodworking Hole Drilling Tool Bit Set of 5

You can use water to cooling it when it is work and it can be used for even longerUniversal compatibility designed for drilling on steel sheets up to 008 in Acrylic pvc and wooden boards up to 02 in Marked with obvious marks for easy and precise hole drilling compatible with drills Suit for use in hardness under 28 artifactssuch as stainless steel iron plate aluminum wood no need of center punchCompared with the ordinary twist drillit is not easy to break and it can be used for deburring chamfering and open hole on wood metal plastic

Solid m35 molybdenum high speed construction with cobalt added for extra durability close to impossible to snap compared conventional drill bits the unique 3sided shank prevents slip in drill chuck and reduces shocks oiling the bits recommended before every use to maximize the service life

Material m35hsscoSize 432mm624mm422mm312mm412mm

Easily drills on iron sheets stainless steel sheets steel sheets as well as aluminum sheetsRevolutionary spiral flute design to minimize the flying metal ashes making the drilling process as well as the hole significantly smoother

 

21. uxcell

uxcell Cemented Carbide Twist Drill Bits 3mm Metal Drill Cutter for Stainless Steel Copper Aluminum Zinc Alloy Iron 6 Pcs

uxcell Cemented Carbide Twist Drill Bits 3mm Metal Drill Cutter for Stainless Steel Copper Aluminum Zinc Alloy Iron 6 Pcs

Round shank design round shank twist drill bit can work with a electric drill excluding in the item Cemented carbide tip 3mm twist drill bits are made of cemented carbide tip for long service life more sharp and durable than others Use note please use low speed when drilling and note the temperature of carbide tip is not too high for extending drill bit life Features milled uflutes with deepcut spiral delivers fast material removal Suitable for drilling in tough metal including heavyduty abrasive alloy and hardened steel

Use for drilling clean accurate holes in sheet metal steel copper brass aluminum plastic wood stainless steel and cast iron

 

22. Drill Hulk

Drill Hulk 13-Piece M35 Cobalt Drill Bit Set for Hard Metal, Stainless Steel, 1/16-Inch to 1/4-Inch, Jobber Length, 3-Flat Shank

Drill Hulk 13Piece M35 Cobalt Drill Bit Set for Hard Metal Stainless Steel 116Inch to 14Inch Jobber Length 3Flat Shank

Made from highspeed steel and 5 cobalt improve much higher heat resistance because of cobalt steels high red hardness provide strong durable performance compared to typical hss drill bits Include 13 pieces cobalt drill bits in inch sizes 116 to 14 164 increments with plastic case Jobber length jobber length cobalt drill bit 135 degree split point reduces drill walking 3flat shank provides a secrue grip in chucks

Can be repeatedly sharpened as needed cobalt drill bits hardness is uniform throughout the entire material so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits Application best used for drilling in hard metal including stainless steel





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