1/8"-1/2” M35 Cobalt Step Drill Bit with Three Spiral Flutes and Hex Shank for Stainless Steel

  TiALN COATING: TiALN coating has excellent characteristics such as high hardness, high oxidation temperature, strong adhesion, small friction coefficient and low thermal conductivity.  THREE FLUTES STEP DRILL BIT: Ordinary step drill bits are prone to deflection during cutting, but three flutes step drill bits are more stable.  M35 COBALT: M35 cobalt HSS step drill bits are more suitable for hard working materials. HEX SHANK: 1/4" hex shank is easy to be installed on impact driver, quick change. And eliminates shank spinning in drill chuck.  STEP DRILL BITS SIZE: 1 pc 13-step (1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2") drill bit