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Best Cobalt Steel Pilot Counterbore

DKIBBITH Pcs M2 Countersink Drill Bit Set, 3in1 Wood Pilot Countersink Drill Bits Drilling #4#6#8#10#12 Screws Holes, with Adjustable Depth Stop, Quick Release Hex Shank, 2-Allen Wrench

  • Easier & Faster – 3 in1 Drill Countersink and Counterbore in one step, with this 7 Pcs M2 Countersink Set you can get perfect counterbored holes for #4 #6 #8 #10 #10 #12 #12 screws without changing bits.
  • Meet All the Needs – with popular 82 Degrees Countersink and 3/8” Counterbore Bits - You can either have the head of the screw below the surface then conceal it with matching wood plugs, or fit flush with the surface.
  • Cutting Depth Adjustable – You may need holes for long or short screws.
  • these counterbore Drill Bits with Adjustable Depth Stop to fit the length of your screws.
  • just tighten the pilot drill bit with the hex key (included) to the Countersink / Counterbore sleeve.
  • Fit Most Tools – 1/4" hex shank design compatible with most quick-change chuck machines or power drills.
  • Includes 7 pieces of Drill/Countersink/Counterbore 3in1 bits in sizes 5/64”, 3/32”, 7/64”, 1/8”, 1/8”, 9/64” 9/64”。.
  • For Hardwood & Softwood - The HSS M2 Grade countersink drill bit perform well in softwood or hardwood and serve the needs of most woodworkers.
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8 Pack Woodworking Countersink Drill Bits Set 3in1 Heavy Duty M2 Pilot Drill Bits Depth Adjustable 82-Degree Chamfer 1/4” Hex Shank for #4#6#8#10#12#14 Screws in Soft & Hard Wood

  • 3in1 Countersink Drill Bit Set – Enable you to Drill, Countersink and Counterbore in one step, ideal woodworking tools for setting screws flush with....
  • Meet All Your Needs–8 pcs Countersink drill bits assortment in size 5/64”, 3/32”, 7/64”, 1/8” (x2), 9/64” (x2), 5/32” for perfect....
  • Easy To Use–3 sharp edged 82-degree chamfer design Counter sink bits built with 1/4" Hex Shanks with groove for quick size changes without bit....
  • Drilling Depth Adjustable–Extra Pilot bits included.
  • Working length of the pilot drill bit is adjustable for precise depth control.
  • Compatible with More Materials – Pilot bits are made of high quality M2 steel, countersink bits make of high carbon steel, able to drill in hard....
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Chicago-Latrobe 550 115 Piece Heavy-Duty Cobalt Steel Jobber Length Drill Bit Set, Gold Oxide Finish, Round Shank, Spiral Flute, 135 Degree Point Angle

  • Manufactured to NAS 907 Type J geometry aerospace specifications with self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging and gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools.
  • performance is similar to uncoated tools.
  • Heavy duty construction for increased strength and rigidity compared to standard drill bits.
  • Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys.
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1/8 Inch Cobalt Drill Bits(10Pcs), HPHOPE M35 HSS Metal Twist Drill Bits Set, Jobber Drill Bits Length and Straight Shank, Suitable for Drilling in Hard Metal, Stainless Steel, Cast Iron

  • 【M35 COBALT HIGH SPEED STEEL】1/8" drill bits for metal made from M35 Cobalt High Speed Steel and contain 5% Cobalt, which increases wear-resistance, durability and extra longer life span, so that the drill bits last through multiple uses.
  • 【135° SPLIT POINT】135°quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. Straight shank of this cobalt steel drill bit allows for firmly holding and accurate centering and makes drilling precise and faster.
  • 【FULLY GROUND PROCESS】Fully ground spiral groove design clears particles quickly, decreases friction and heat for faster drilling performance.
  • 【PROFESSIONAL & WIDELY USE】Jobber drill bits perfectly Suitable for drilling holes as Stainless Steel, Copper, Cast Iron, Galvanized Pipe, Aluminum Alloy, Wood and Other Softer Metals. Not for Glass or Ceramic Materials.
  • 【EASY USE & STORAGE】This metal twist drill bits set includes 10pcs 1/8" Cobalt Drill Bits, This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and DIY, household maintenance and repair.
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Drill Hulk 7-Piece M35 Cobalt Left Hand Drill Bit Set for Removing Damaged Bolts and Screws, 5/64-Inch, 7/64-Inch, 5/32-Inch, 1/4-Inch, 19/64-Inch

  • STUBBY MECHANICS LENGTH: 135 degree split point reduces drill walking, straight shank.
  • MADE FROM HIGH-SPEED STEEL AND 5% COBALT: improve much higher heat resistance because of cobalt steel's high red hardness, provide strong durable performance compared to typical hss drill bits.
  • CAN BE REPEATEDLY SHARPENED AS NEEDED: cobalt drill bit's 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 removing damaged bolts and screws, or drilling a pilot hole for a screw extractor.
  • INCLUDE: 2pcs 5/64 inch, 2pcs 7/64 inch, 1pc 5/32 inch, 1pc 1/4 inch and 1pc 19/64 inch cobalt left hand drill bits with case.
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Drill America - DEWPIL1/4X3/16 DEWCBR Series Qualtech High-Speed Steel Pilot for Counterbore, 3/16\ Shank Diameter, 1-3/4\ Length, 1/4\ Size (Pack of 1)

  • High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.
  • Available in 1-3/4-inches overall length.
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3/8 Inch Cobalt Drill Bits(5Pcs), HPHOPE M35 HSS Metal Twist Drill Bits Set, Jobber Drill Bits Length and Straight Shank, Suitable for Drilling in Hard Metal, Stainless Steel, Cast Iron

  • M35 COBALT HIGH SPEED STEEL: 3/8" drill bits for metal made from M35 Cobalt High Speed Steel and contain 5% Cobalt, which increases wear-resistance, durability and extra longer life span, so that the drill bits last through multiple uses..
  • 135° SPLIT POINT: 135°quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. Straight shank allows for firmly holding and accurate centering and makes drilling precise and faster..
  • FULLY GROUND PROCESS: Fully ground spiral groove design clears particles quickly, decreases friction and heat for faster drilling performance..
  • PROFESSIONAL & WIDELY USE: Perfectly Suitable for drilling holes as Stainless Steel, Copper, Cast Iron, Galvanized Pipe, Aluminum Alloy, Wood and Other Softer Metals. Not for Glass or Ceramic Materials..
  • EASY USE & STORAGE: The set includes 5Pcs 3/8" Cobalt Drill Bits, This drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and DIY, household maintenance and repair..
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Hymnorq 3/8 Inch Fractional Size M35 Cobalt Steel Twist Drill Bit Set of 5pcs, Jobber Length and Straight Shank, Extremely Heat Resistant, Perfect Drilling in Stainless Steel and Cast Iron

  • 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, ideal for repeated drilling in metalworking..
  • FOR METALWORKING - Particularly successful in cutting through hard metals(hardness 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..
  • SELF CENTERING - The 135°quick-cut pilot split points are self-centering 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..
  • 5PC SET - The set includes 5pcs of 3/8” diameter M35 grade cobalt steel twist drill bits, packed in a convinient and reuseable PVC case for easy storage and carrying. Manufactured to German DIN338 standard..
  • DOWNLOADABLE USER GUIDE - We've 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 w....
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Hymnorq 1/2 Inch Fractional Size M35 Cobalt Steel Twist Drill Bit Set of 2pcs, Jobber Length and Straight Shank, Extremely Heat Resistant, for Drilling in Stainless Steel and Cast Iron

  • 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, ideal for repeated drilling in metalworking..
  • FOR METALWORKING – Particularly successful in cutting through hard metals(hardness 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..
  • SELF CENTERING – The 135°quick-cut pilot split points are self-centering 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..
  • 2PC SET – The set includes 2pcs of 1/2” diameter fractional inch size M35 grade cobalt steel twist drill bits. Total lenght: 5.98 inch.
  • working length: 4.49 inch. Manufactured to German DIN338 standard. Packed in a plastic bag and a flat paper box..
  • DOWNLOADABLE USER GUIDE – We’ve summed up some tips of drilling metals, including a RPM chart for several common metals, based on our reviews and....
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Century Drill & Tool 26529 Pro Grade Cobalt Drill Set, 29 Piece, Made in The USA, for Stainless Steel and Hard Metal

  • Set includes 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64" and 1/2" cobalt drill bits.
  • Century Pro Grade drills are made from 5% industrial quality M35 cobalt alloy high speed steel..
  • Cobalt is extremely heat resistant, when used and operated in power units that have a RPM speed of 1,500 or more for maximum efficiency..
  • Lasts up to 12 times longer than the average consumer-grade high speed steel drill..
  • 135 degree quick-cut point penetrates faster and will not walk or wander at the starting surface. Does not require a center punch or pilot hole..
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Hymnorq Metric 1.0-10 mm Straight Shank M35 Grade Cobalt Steel Jobber Length Twist Drill Bits Set of 19pcs for Metals, Packed in Indexed Metal Case

  • COBALT STEEL - Manufactured from M35 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..
  • SELF CENTERING - The 135°quick-cut pilot split points are self-centering 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..
  • 19PC METRIC SET - The set includes 19pcs of M35 cobalt steel twist drill bits: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7 mm, 7.5mm, 8 mm, 8.5mm, 9 mm, 9.5mm, 10 mm. Well organized in a tough metal indexed storage case for easy transport to your worksite..
  • FOR METALWORKING - Particularly successful in cutting through hard metals(hardness 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 ad....
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Hymnorq 7/16 Inch Dia. x 5.51 Inch Long M35 Cobalt Steel Twist Jobber Length Drill Bits 2PC Set, 135 Degree Split Point, Extremely Heat Resistant, for Stainless Steel and Cast Iron

  • COBALT STEEL - Manufactured from M35 cobalt steel, with molybdenum and cobalt added to create a hardened heat-resistant 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..
  • SELF CENTERING - The 135°quick-cut pilot split points are self-centering 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..
  • 2PC 7/16 INCH FRACTIONAL BITS - The set includes 2pcs of M35 cobalt steel twist drill bits. Total length: 5.51".
  • working length: 4.06". Manufactured to German DIN338 standard. Packed in a plastic bag and a flat paper box..
  • FOR METALWORKING - Particularly successful in cutting through hard metals(hardness 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..
  • DOWNLOADABLE USER GUIDE - We've summed up some tips of drilling metals, including a RPM chart for several common metals, based on our reviews and some articles on the ....
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Drill America DEWCBR Series Qualtech High-Speed Steel Counterbore, 1/2\ Shank Diameter, 3/16\ Pilot, 5-1/8\ Length, 5/8\ Size (Pack of 1)

  • High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.
  • Round shanks allow use with a wide variety of toolholding systems.
  • Counterboring is the enlargement of a portion of a hole that has previously been formed.
  • The counterbor is a two-piece construction, having an integral shank and counterbore-cutter, and a pilot that is interchangeable, which provides flexibility in the use of the tool.
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