Top 10 M42 Cobalt Drill Bits for Hardened Steel – Jobber Drill Bits

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BOSCH CO14B 14 Pc. Cobalt M42 Drill Bit Set

BOSCH #ad - Cobalt m42 drill bit – provides upgraded m42 cobalt jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, titanium, cast iron, light-gauge metal and aluminum. Thick web-helix design – provides additional stability in tough applications. Enhanced m42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Surface-hardened tip – penetrates tough abrasive materials. High-heat resistant bits – withstand high-temperature applications for extended periods of time. Standard bits.
BrandBOSCH #ad
ManufacturerBosch #ad
Part NumberCO14B
WarrantyProduct Defects Only



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

STROTON #ad - 19pcs 135 degree split point drill bits includes :1mmlength:3. 4cm\1. 5mm\2mm\2. 5mm\3mm\3. 5mm\4mm\4. 5mm\5mmlength:8. 5cm\5. 5mm\6mmlength:9cm\6. 5mm\7mm\7. 5mm\8mmlength:11.

5cm\8. 5mm\9mm\9. 5mm\10mmlength:13cm DIA 05mm Increments. Premium m42 8% cobalt steel, usually give the best Heat, 68-70 hrc rockwell hardness Scale, Wear and Chip Resistance and Long Tool Life. 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. 3 steps desigh for cutting through Stainless Steel, Aluminum, Hard Metals, Plastic. This cobalt drill bit is typically capable of running three to five times Faster. Despite the higher price, the cost per hole when Using Cobalt Drill Bit Will be the Lowest, Since It Can Produce So Many More Holes.
BrandSTROTON #ad
ManufacturerSTROTON Ltd #ad
Part NumberM42 Cobalt-8(19pcs)

3. Drill Hog


21 Pc Cobalt M42 Drill Bit Set 1/16" to 1/2" by 32nds DRILL HOG

Drill Hog #ad - 135 degree split Point Prevents "walking". Lifetime Warranty. 1/16 to 1/2" by 1/32nds includes Steel Case with Pop Up Tiers. Tri flat shank - 3 flat sides on Shank Prevents "Spin" in the Chuck. Solid cobalt M42 Steel.
BrandDrill Hog #ad
ManufacturerDrill Hog #ad
Weight1 Pounds
Part Number21M42GB



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

COMOWARE #ad - Size included: 15pcs jobber length drill bit set with plastic storage case including sizes:1/16" 2pc, 1/4" 1pc, 3/16" 1pc, 7/32" 1pc, 1/8" 2pc, 5/64" 1pc, 5/16" 1pc, 3/32" 2pc, 5/32" 1pc, 7/64" 1pc, 9/64" 1pc, 3/8" 1pc.

Prevent walking, clear chips and particles faster. Produced by precision fully ground which ensures chips move smoothly. Durable and strong. Twist design & performance: precise 135°split point, gold oxide finish and round straight shanks. High quality material: 5% cobalt high Speed Steel M35 provide extended tool life compared to ordinary drill bits. 100% satisfaction guarantee: if you are not 100% satisfied with your purchase for any reason whatsoever simply please feel free to contact us.

Particularly successful in cutting through hard metals such as stainless steel, cast iron, hard plastics and woods, high temperature alloy, titanium alloy, and also can be used for softer materials. Professional & widely use: m35 cobalt hss is more suitable for hardened material.
ManufacturerCOMOWARE #ad

5. Drill America


Drill America, 1/2" X 64ths, D/ACO Series, D/A29J-CO-PC 29 Piece M42 Cobalt Drill Bit Set in Round Case 1/16"

Drill America #ad - Cobalt steel provides extended tool life compared to high-speed steel drill bits, and maintains the tool's toughness and hardness in high drilling temperatures. Set contains 29 m42 cobalt drill bits sizes 1/16" - 1/2" x 1/64" increments.

Round shanks allow use with a wide variety of tool holding systems. Gold oxide finish acts as a lubricant and provides wear resistance. Unique round drill index combines form and function into 1 beautifully designed, easy to carry drill set. Manufactured to aerospace standard 907 and display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steel.

Effortlessly grip the set in 1 hand as you would a travel coffee mug or leave it in the cup holder of your truck while on the way to a job. When all hands are on deck, hang the drill index on your belt whether you're in the shop or field. Cobalt drills are effective in drilling tough, Inconel, high tensile strength materials like stainless steel, and titanium.
BrandDrill America #ad
ManufacturerDrill America #ad
Height2 Inches
Length6 Inches
Weight2.2 Pounds
Width4 Inches
Part NumberD/A29J-CO-PC

6. Irwin Tools


M35 Cobalt Steel, 29-Piece 3018002, IRWIN Drill Bit Set

Irwin Tools #ad - Heavy duty web construction For Strength & Durability. Cobalt drill Bit Set. 5% cobalt for higher Heat & Abrasion Resistance. Sizes 1/16 inch -1/2 inch in 1/64 inch increments, 135 Degree Split Point To Minimize Walk. 29 piece.
BrandIrwin Tools #ad
ManufacturerIRWIN #ad
Height4 Inches
Length12 Inches
Weight4.5 Pounds
Width7.5 Inches
Part Number3018002



BOSCH 21 Piece Cobalt Metal Drill Bit Set CO21

BOSCH #ad - And larger. Accuracy: featuring a no-skate split-point tip for clean, precise holes and accurate starts. Included bit sizes: 1/16 in. 13/64 in. 11/64 in. 7/32 in. 1/4 in. 5/16 in. 9/64 in.

15/64 in. 7/64 in. 5/64 in. 1/8 in. 3/16 in. 5/32 in. 3/8 in. 3/32 in. 1/2 in. Performance: designed for very high drilling temperatures for superior performance in stainless steel. Tough: the bosch co21 drill bit set is manufactured from cobalt for drilling in hard and abrasive materials such as stainless, wood, and high-density metal. Reliable: the three-flat shank design promotes better grip and guards against slipping on bits 3/16 in.

Bosch cobalt metal drill bits are solid, reliable, and provide 4X longer life than standard high-speed drill bits. Also useful for general drilling in light-gauge metal, cast iron, and plastic. Versatility: includes laser-etched marking to provide clearly marked bit diameter.
BrandBOSCH #ad
ManufacturerBosch #ad
Height1.5 Inches
Length4.6 Inches
Weight1.1 Pounds
Width9 Inches
Part NumberCO21

8. Drill Hog


Drill Hog USA 13 Pc COBALT Drill Bit Set Index M42 Drill Bits

Drill Hog #ad - 135 degree split point Prevents the Bit from "Walking". 1/16" - 1/4" by 1/64ths 13 Drills. Lifetime Warranty. Made by drill Hog USA. Solid cobalt M42 Steel.
BrandDrill Hog #ad
ManufacturerDrill Hog #ad
Part Number13M42GB

9. Dewalt


14-Piece DWA1240, DEWALT Cobalt Drill Bit Set with Pilot Point

Dewalt #ad - Dewalt drill bit set comes with clear lid allowing you to easily see contents at glance. Connectable accessory storage system to optimize storage space of drill bits for wood, metal or i-beams.

Pilot point tip starts on contact for clean, accurate holes and reduces lock-up on breakthrough. Industrial strength cobalt for optimum life and durability in metal. Clip latch for secure closing. Patented bit-bar design allows easy removal of drill bits and customizable placement. Maximum speed and life in stainless steel and other hard metals. Small bulk storage size fits inside the Small and Medium ToughCase+ sold separately - Ideal for organizing loose bits. No bit walking - more user control.
BrandDewalt #ad
ManufacturerDewalt #ad
Height8.75 Inches
Length8.75 Inches
Weight0.8 Pounds
Width1.74 Inches
Part NumberDWA1240

10. amoolo


Hard Metal, M35 HSS Metal Drill Bits for Steel, Plastic and Wood, Stainless Steel, amoolo Cobalt Drill Bit Set 1/16"-1/4",13 Pcs, Cast Iron

amoolo #ad - Not for high carbon Steel and Heat-Treated Steel. 135° split point with round straight shank prevents walking and makes drilling precise and faster. 90 days warrantyat amoolo, we center on customer satisfaction. No center punch is needed. Precise & efficient drilling performance fully ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance.

They fit the majority of power drill currently on the market and comes with a portable plastic case for easy storage and organization. Premium qualitymade of industry grade 6542 high speed steel, cobalt twist drill bits are harder than 4241/4341 HSS used in other similar bits, ideal for heavy duty hole drilling. Most commonly-used 13 sizesa complete combo set of 13 jobber length industrial drill bits for metal drilling 1/16", 9/64", 5/32", 15/64", 5/64", 3/32", 13/64", 3/16", 7/32", 11/64", 1/8", 7/64", 1/4" .

Pay attention to speed, Steel, Aluminum Alloy, pressure and heat control during drilling. Not for glass or Ceramic Materials. Multiple applicationperfectly suitable for cutting through hard metal such as stainless steel, sheet Metal and Cast Iron as well as Plastic, Wood and Other Softer Metals. They contain 5% cobalt material, increasing wear-resistance and durability. Get your drill bits today along with our 90-day Hassle-Free Warranty Policy, exchange or refund guaranteed for any product defect! .
Brandamoolo #ad
Manufactureramoolo #ad
Height0.3 Inches
Length6.4 Inches
Width8.4 Inches