GREENER Hex Shank Twist Drill Bit with Cobalt for Stainless Steel, High Hardness Metal Steel Hand Drill Chuck

High hardness with 65-66.5 HRC base hardness, enhanced by nitriding and high-temperature forging processes

Superior wear resistance and high-temperature tolerance

Sharp and durable cutting edges, resistant to burning and breakage

135° standard tip angle with fully ground double margin for precise drilling

Enlarged U-shaped spiral flutes for efficient chip removal and reduced heat generation

Hex shank design for anti-slip grip and compatibility with a wide range of drilling machines

Suitable for drilling hard metals including stainless steel, mold steel, spring steel, aluminum alloy, brass, steel plates, cast iron, galvanized pipes, and titanium alloy

Easily drills through stainless steel (304 grade) and mold steel deep holes with high efficiency

Maintains sharpness and durability under high load and temperature conditions

Compatible with electric drills, handheld drills, bench drills, impact drills, electric wrenches, drilling machines, machining centers, and magnetic drills

Not recommended for use with lithium-ion drills below 24V due to insufficient power

Use water cooling when drilling high hardness materials to prevent drill bit damage