Product Information:Greenlee holemaking tools are made for the trade and is the preferred brand of the electrical contractor. Greenlee 34401 MultiHole Step Bit in 1/2" features a unique design that will penetrate through steel faster. Its doubleflute construction is balanced and requires less pressure; practically does the work for you. Greenlee Kwik Stepper step bits will resist walking and skidding, even on round surfaces. This electrician's step bit is both designed and manufactured in USA. Features:#149; Unique split tip design penetrates through steel faster#149; Resists walking or skidding, even on round surfaces#149; Balanced, doubleflute construction requires less pressure, does the work for you#149; Designed and manufactured in USA Specifications:#149; Model Number: 34401#149; Hole Sizes: From 1/8" through 13/8" (3.2 34.9 mm)#149; Capacity: Cut up through 3/8" (9.5 mm) mild steel, copper, brass, aluminum, wood, plastic and laminates