Four Spiral Flute Cobalt Step Drill Bit V1.0 Size:3/16" - 7/8" Highly Durable & Wear-resistant -

Highly Durable & Wear-resistant - Our hinge plate heads are crafted from cast iron

each bit starts precisely without wandering

or industrial use

Made from heat-treated chrome vanadium steel for high hardness

designing for exceptional hardness and powerful torque

Four Spiral Flute Cobalt Step Drill Bit V1.0 Size:3/16" - 7/8" Highly Durable & Wear-resistant -Premium Performance the aluminum titanium nitride coating gives it extra hardness to achieve a faster, butter cutting like experience. Four cutting blade guarantees a faster and smoother cutting, allowing the swarf to escape easily; Super Durable Bit Lifetime is up to 10x longer compared to normal titanium bits; For Use On Perfect for Stainless Steel Metal Sheet Wood Plastic Aluminum Sheet Copper and other metal sheets; 1 4" Hex Shank Quick Change