Irwin Wood Auger Drill Bit

The Irwin IRW10502761 is an 18mm diameter auger drill bit with a 191mm overall length, perfectly sized for major structural fixings, large cable routing, and heavy-duty construction applications. This substantial diameter is commonly specified for larger coach bolts, major structural fastenings, and anywhere significant through-holes are required in timber framing and heavy joinery work. Designed for all general wood boring, this auger bit offers superior performance in robust structural applications. The single spur cutting edge scribes the circumference of the hole for a smoother quality finish that's ready for immediate use with structural fasteners, whilst the hexagon shank prevents slipping in drill chucks or bit extensions even when boring through dense structural timbers. The solid centre provides extra rigidity whilst boring, essential for maintaining accuracy with this larger diameter where cutting forces are substantial. The self-feeding screw point provides faster boring in both soft and hard woods, significantly improving productivity on construction sites, and the fully hardened body from tip to shank provides extra durability under the demanding conditions of heavy construction work.