Features: 10 MM SHAFT - Thanks to the specially manufactured shaft, our HSS step drill fits into all cordless screwdrivers and drills. DRILLING WITHOUT DANCING - The self-centering tip precise cutting of the tapered drill cut itself into the material without getting lost. The straight flutes offer optimal chip ejection PLEASE NOTE: As a plastic drill or sheet metal drill: Drill clean holes in sheets made of steel, aluminum, brass and copper. Also great for wood and plastics. Not for stainless steel WITHOUT DRILL REPLACEMENT - pre-drilling, boring and deburring in one step. The hole drill offers extreme ease of work. Perfect for cable routing, bodywork, rain barrel, wooden panels etc. Specification: Size of each step: 5mm, 7mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 30mm, 32mm, 35mm Handle thickness: 10mm Material: HSS4241 Purpose: Suitable for opening and reaming steel plates, sheet metal, aluminum alloy, and plastic plates with a thickness of less than 3mm. Package List: 1x Step Drill