ReviewsHeavy duty Cobalt Pilot Counterbore

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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uxcell Knurled Insert Nuts, M8 x 10mm(L) x 10mm(OD) Female Thread Brass Embedment Assortment Kit, 5 Pcs

[SIZE] - M8x1.25mm thread size, 0.39" (10mm) long, 0.39" 10mm outer diameter ,OD tolerance: +0.02"/0"..
[MATERIAL] - Made of brass, rust resistance, good thermal conductivity and heat resistance, can ensure long time using..
[FEATURE] - Can be installed by ultrasonic or heat into thread tapered hole, or in during injection..
[ADVANTAGE] - No need to counterbore or countersink the boss hole since the insert has guide pilot..
[APPLICATION] - Widely used on injection for fastening..

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STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

【Premium True 5% Cobalt Steel with 68 HRC】- The Marked Cobalt Content of Ordinary Drill Bits May be False, but This Drill Bits Set is Made of Cobalt Ore from Our Own Mine, Which Indeed Contains 5% Cobalt. Although the Cost and Price are Slightly Higher, It Usually is able to Provide 3X Heat,Wear and Chip Resistance and 3X Tool Life..
【Split Point Design and Fully Ground Process】- Compared with Other Ordinary Drill Bits, This Drill Bits Set is Particularly Suitable for Heavy Duty Work, Such as Cutting through Stainless Steel,Steel Plate,Iron Sheet, Cast Iron and Hardwood, and Drilling Out Bolts Studs and Screws..
【3X Efficiency + 3X Tool Life】- This Cobalt High Speed Steel Drill Bits Set is Typically Capable of Running 3 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..
【Sharp Drill Bit Edge】- This Kind of Drill Bits Beast Can Even Cut Hardened Metal into Long Iron Bars, While a Dull Drill Bit Can Just Slowly Wear Through Metal..
【13 Pieces Jobber Length Industrial Drill Bits 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 [DIA 1/64 Inch Increments].

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OXMUL Step Drill Bits for Metal, 1/8 to 1/2, Cobalt Bit, Heavy Duty for Stainless Steel,Metal, Aluminum, Wood, Copper, Wood, 13-Steps. #202

【Heavy Duty for Stainless Steel】 The Cobalt Drill Bits(1.3243 STEEL) can drill 6X longer life and 2X faster. This Drill bits is heavy duty for Stainless Steel, Metal, Galvanized Steel, Aluminum,Iron, Wood, PVC and Copper. If you want to drill faster and many holes on metal, please choose this step drill bit.
【Cobalt Bits】 Prefect for Stainless Steel/Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets. This Drill bit can successfully drill more and more holes easily into Stainless Steel plate like knife through butter!.
【120-DAYS WARRANTY】 - If not satisfied, Any Reason, please contact us for 100% refund or replacement.
【13 Steps︱2-Spiral-Flute︱1/4" Shank】 13-STEPS: 1/8,5/32,3/16,7/32,1/4,9/32,5/16,11/32,3/8,13/32,7/16,15/32 to 1/2 inches. 2-Spiral Flute:Clears Chips faster.
【Cutting Fluid】 Cutting Fluid must be poured during work for longer life! Prohibit water-cooling to prevent!.

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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 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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DRILLFORCE HSS General Purpose Heavy Duty Cobalt Jobber Length Twist Drill Bits Size 1/16 with 10pcs in Plastic Bag, ideal for drilling on mild steel, copper, Aluminum, Zinc alloy etc.

10pcs HSS Cobalt Jobber Length Twist Drill bit in Plastic bag with Lables with Size 1/16".
High Quality Material- High Speed Steel Cobalt -M 35 Cobalt Steel Best Material..
High Efficiency In Drilling Metals, and Stainless Steel..
Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel.
135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface.

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Qualtech 1-1/2\ HSS 4MT Taper Shank Drill Bit, DWDTS1-1/2

Cobalt taper shank drills are made of heat resistant cobalt..
Engineered with heavy-duty construction to perform well in tough, hard-to-machine materials..
Morse taper shank allows the tool to be inserted directly into the machine's spindle to facilitate high-torque applications such as large cut diameters.
When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging.
Designed to perform in a broad range of materials in the iron and steel families.

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Bosch HSBIM9 General-Purpose 9 pc. Bi-Metal Hole Saw Kit

All-in-one kit – features two SpinLOCK Universal arbors, steel pilot bit and six hole saws with Progressor tooth design.
SpinLOCK universal arbor – fits all brands and sizes to simplify diameter changes with fast plug removal and tool-free install.
The pilot bit – designed to start holes in a variety of materials.
Progressor tooth design – hole saws feature alternating teeth size for performance, cutting faster and lasting longer in wood, metal and plastic materials.
Durable hole saw material – hole saws are made with 8% cobalt alloy.

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HHIP 2006-0124 7/16 Inch HSS Square Push Broach

Broach is tapered and Ground with bright finishing. Tolerance .4385.4395.
High speed steel Used for cutting square shaped hole in round pilot holes.

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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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