Meco 4-22mm 1/4 Inch Hex Shank M35 Cobalt Step Drill Bit Spiral Grooved Step Drill

Description: 4-22mm 1/4 Inch Hex Shank M35 Cobalt Step Drill Bit Spiral Grooved Step Drill Specification: Material HSS-Co Handle type Hex handle Handle diameter 1/4" Hex Step quantity 10 steps Handle length 31mm Edge length 50mm Step diameter 4/6/8/10/12/14/16/18/20/22 mm Features: Made from HSS-Co, heat treatment to it, high hardness, high wear resistance, high toughness, high bending strength, 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 bench drill, applicable for punching on these harder workpieces, such as stainless steel, carbon steel, aluminum plate, iron plate, etc. Note Please water it for cooling while punching so that can prolong its lifetime, rotation rate from 250 to 400 is recommended. Package Included: 1 x Step Drill More Details: