Irwin Wood Auger Drill Bit

The Irwin IRW10502748 is a 12mm diameter auger drill bit with a 191mm overall length, perfectly sized for substantial fastener applications, larger cable routing, and heavy-duty joinery work. This popular diameter is widely used in construction for coach screws, substantial bolts, and anywhere a larger clearance hole is required in timber work. Designed for all general wood boring, this auger bit offers superior performance in demanding applications. The single spur cutting edge scribes the circumference of the hole for a smoother quality finish that's ideal for visible joinery and precision fastener work, whilst the hexagon shank prevents slipping in drill chucks or bit extensions even under significant drilling load. The solid centre provides extra rigidity whilst boring, which is particularly important with larger diameter bits where cutting forces are higher. The self-feeding screw point provides faster boring in both soft and hard woods, making repetitive hole drilling far less tiring, and the fully hardened body from tip to shank provides extra durability under the demanding conditions of large-diameter boring.