Atoplee 1pc HSS Cobalt M35 Step Drill Bit Hex Shank Step Cone Drill Bit Hole Cutter,9 steps 4-12mm

Features: 100% brand new and high quality. Made from HSS-Co, heat treatment to it, high hardness, high wear resistance, high toughness, high bending strength, sharp edge, the best choice for processing stainless steel, better than ordinary step drill. Unique step structure, a drill can punch out a variety diameters of holes. Does not need center punch to assist it, compared with ordinary hemp flower drill, it is stabler and difficult to be broken. It has these functions that hemp flower drill does not have, such as burrs removing, chamfering, punching elliptic hole, etc. It is suitable for being installed on the pistol drill and bench drill, applicable for punching on these harder workpieces, such as stainless steel, carbon steel, aluminum plate, iron plate, etc.