Greenlee 34403 Multi-Hole Step Bit, 7/8" N/A Imported Unique split tip design penetrates through steel faster Resists walking or skidding Balanced, double-flute construction requires less pressure Hole Sizes: From 1/8-Inch through 1-3/8-Inch (3.2 - 34.9-mm) Capacity: cut up through 3/8-Inch (9.5-mm) mild steel, copper, brass, aluminum, wood, plastic and laminates