Irwin HSS Pro Drill Bits

The Irwin HSS Pro Drill Bit in 13mm diameter is supplied in a bulk pack of 5, making it a practical option for workshops and construction sites requiring this larger professional size. The 13mm diameter is commonly used for heavy structural metalwork, industrial fabrication, and creating holes for large through-bolts and anchors in demanding engineering and construction applications. Featuring high-quality HSS steel construction, this drill bit is engineered to withstand demanding professional use in challenging industrial environments. The precision ground cutting edges enable fast drilling whilst ensuring perfect finishing, and the ground flute design provides maximum accuracy combined with fast chip removal for efficient drilling through steel, cast iron, and other robust materials.