Bosch PRO HSS-G Metal Drill Bit

The Bosch HSS-G Twist Drill Bit in 4mm, supplied as a pack of 2, provides maximum precision for drilling in metal, cast steel, sintered iron, malleable cast iron, non-ferrous metals, and hard plastics. The exposed 135° self-centring split-point tip combines active cutting and perfect centring, with no pre-punching needed for holes up to 10mm. Precision-ground from HSS, it delivers up to 40% faster drilling and up to 50% lower feed pressure compared to standard chisel-edge bits. Manufactured to DIN 338 Type N, h8 diameter tolerance.