M35 5% Cobalt Step Drill Bit 3-12 4-22 6-24 HSS-CO HSS Cone Metal Drill Bit

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 select for processing stainless steel better than ordinary step drill. * To reduce mit and run cooler. *Automatically deburr holes as you drill. *Unique step structure a drill bit that allows you to make holes of various sizes making the perfect hole is easily. *A step drill with a box. very convenient. *Does not need center punch to assist it compared with ordinary hemp flower drill it is stabler and difficult to be broken. *It is suitable for being installed on the pistol drill and bench drill applicable for punching on harder workpieces widely used to cut holes in a variety of material like stainless steel tapping steel wood thin iron aluminum alloy moisture boards PVC sheet ect Note: Please water it for cooling while punching so that can prolong its lifetime rotation rate from 250 to 400 is recommended. Specifications: Material: HSS-Co(HSS M35 5% Cobalt) Handle type: Hex handle Handle diameter: 1/4 (6.35mm) Model Step quantity Edge length Handle length Step diameter 3-12mm 9steps 50mm 31mm 3-4-5-6-7-8-9-10-12mm 4-22mm 10steps 50mm 31mm 4-6-8-10-12-14-16-18-20-22 mm 6-24mm 11steps 57mm 31mm 6-8-10-12-13-14-16-18-20-22-24 mm Package Contents: 1* Drill