Irwin HSS Pro Drill Bits

The Irwin HSS Pro Drill Bit in 11.5mm diameter comes in a bulk pack of 5, offering excellent value for professionals working with this larger specialist size. The 11.5mm diameter is particularly suited to heavy-duty industrial work, structural metalwork fabrication, and creating precise holes for large fixings and through-bolts in demanding construction and engineering applications. Featuring high-quality HSS steel construction, this drill bit is designed to withstand regular professional use in the most challenging environments. The precision ground cutting edges deliver fast drilling with perfect finishing, whilst the ground flute design ensures maximum accuracy and promotes fast chip removal, maintaining clean cutting performance throughout extended drilling operations.