SIGNET Drive Impact Compatible Cobalt Step Drill for Stainless Steel and Drilling Capacity 46769 6.35 Iron, 4-22mm,

Overall length (mm): 85　Drilling dimensions (Φmm): 4/6/8/10/12/14/16/18/20/22 Number of stages: 10 stages Material: Cobalt Appropriate rotation speed (rpm): 300-600 Compatible with impact drivers. For electric drills, cordless drills, drill presses, and machine tools. This tool drills holes in the target area while rotating. This is a three-piece drill that can be used to drill multiple sizes of holes, enlarge hole diameters, repair holes, and deburr.