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5PCS SIZE 7.7mm,M42 8% Cobalt,drill bits for metal,Metal Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron

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MATERIAL: M42 8% Cobalt Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
SIZE : Metric 7.7mm , 3 Steps Desigh for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic
PACKAGE: 5pcs Each pack,This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.So It Can Produce Many More Holes.
HRC: 67-70HRC, 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.
FEATURES:With a cobalt content of 8%, cobalt improves the bit's high-temperature and abrasive resistance. Stainless steel is usually machined with the M42 bit for small size drill bits because the M42 bit has higher strength, higher hardness, better toughness and is less likely to break. It's the best material in the drill!

use

Widely used in stainless steel, die steel, aluminum alloy, cast iron, copper, galvanized pipe

Such as metal material punching

Features

High hardness, wear resistance, positioning, good chip removal, high efficiency

High hardness, strong wear resistance, specially made stainless steel

Precision grinding process

Smooth surface, high grinding precision

135° standard double rear edge Angle

Full grinding drill, sharp and durable knife edge, stable feed

Select high hardness material containing drill

Quenched plated drill more wear resistant, bring more durable work experience

Helical chip removal design

The spiral design is more rapid for drilling and chip removal

Universal handle type, widely used, clamping and fastening, smooth surface, high grinding precision

Brand	HUAZHICHUN
place of origin	China
The material	M42 drill high speed steel
Use	Plays, stainless steel, copper, titanium alloy material, etc
Advantages	High hardness, wear resistance, positioning, good chip removal, high efficiency