QST M35 HSS-Co Cobalt Spiral Grooved Step Drill Bits 1/4" Hex Shank Wood Steel Aluminum Metal Cone Drilling 3-12mm Hole Saw

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Product Features

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. 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. Step diameter:3/4/5/6/7/8/9/10/12 mm;Handle length:31 mm;Edge length :50 mm