B1220 12xD Drill Bit with RI D: 3.3

All-in-one carbide drill bit 12 x D with TialN coating with internal cooling and right grinding Sharp angle 135o, spiral angle 30; special cutting geometry for pre-drilled pre-drilling with 3 x D drill bits that guarantees perfect concentration; special sharpness of the channels to reduce the coefficient of friction, improves the removal of Spain; for working with external cooling Diameter: 3.3 mm