Irwin HSS Pro Drill Bits

The Irwin HSS Pro Drill Bit in 4mm diameter measuring 4.0 x 75mm comes individually packaged in a PVC tube, offering convenient single-bit supply for professionals requiring occasional replacements. The 4mm diameter is widely used across construction, metalworking, and joinery applications, particularly for standard fixing holes and general fabrication work. Constructed to DIN 338 standards from high-quality HSS steel, this drill bit features precision ground cutting edges that deliver fast drilling and perfect finishing. The ground flute design ensures maximum accuracy whilst promoting efficient chip removal, maintaining clean cutting performance. The universal 118° point shape ensures suitability for alloyed and unalloyed steel, non-ferrous metals, cast iron, and plastics in trade and industrial applications.