Step Drill Bit, 1/8" To 1/2"

True round holes every time with the single cutting edge, allowing for more control and a cleaner finish. Black oxide finish resists corrosion, extending the life of the bit. Ideal for cutting into stainless steel, aluminum, brass, copper, plastic and even more. Speed start tip reduces the risk of bit walking and starts fast. Fast and easy hole size identification with laser etched markings. The 3 flat shank on the 13 hole bit prevents the bit from slipping in the chuck. The 1/4 inch hex shank allows for fast bit change in impact drivers and sure grip in chucks.