Irwin HSS Pro Drill Bits

The Irwin HSS Pro Drill Bit in 12.5mm diameter comes in a bulk pack of 5, offering excellent value for professionals who regularly work with this larger heavy-duty size. The 12.5mm diameter is particularly useful for structural engineering, heavy industrial fabrication, and creating holes for large anchors and through-bolts in demanding construction and metalworking applications. Manufactured from high-quality HSS steel, this drill bit delivers consistent performance throughout the most challenging applications. The precision ground cutting edges provide fast drilling with perfect finishing, whilst the ground flute design ensures maximum accuracy and promotes fast chip removal, maintaining efficient cutting performance during extended use across various robust materials.