[Bulk Buy] 1/4" M35 Cobalt Four Spiral Flute Step Drill Bit for Metal, Wood, Plastic

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 - Quick release slot to eliminate slipping.