Bosch Professional HSS Impact Drill Bit 4.0mm (1-piece Cocoon)

This drill bit is compatible with a 1/4-inch hex-shank system for universal use with drill drivers, impact drivers and drill stands. The Impact Control HSS Twist Drill Bit offers highly robust drilling in metal, especially with impact drivers. Extremely strong body is extremely robust. The twist drill bit is precision-ground from solid metal and has an oxide-coated flute, giving it an excellent surface quality for slicing through materials with reduced wear. It is suitable for use on alloyed and non-alloyed steel, cast steel, cast iron, sintered iron, non-ferrous metals, sheet metals and plastics.