Greenlee 30008C Kwik Stepper #8 XT Cobalt Step Bit, 1-1/8" Two cutting edges share the load resulting in faster drill times with less force New split point tip eliminates walking and penetrates quickly Cobalt HSS engineered for maximum life on stainless steel Steam oxide finish runs cooler and extends the life of the bit Also cuts mild steel, copper, brass, aluminum, fiberglass, plastic, wood and laminates