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FAST SELF-DRIVING TIP: Specially designed threaded tip automatically engages timber and pulls the bit through with minimal pressure, reducing fatigue and preventing skating on smooth surfaces. IMPACT RATED HEX SHANK: 1/4" quick-lock hex shank ensures a secure, slip-resistant connection in impact drivers and drill drivers for high torque applications. UP TO 3x FASTER DRILLING: Optimised cutting geometry delivers significantly faster boring performance compared to standard flat bits, ideal for repetitive joist and stud drilling. HEAT TREATED STEEL CONSTRUCTION: Manufactured from precision heat treated carbon steel with corrosion resistant black oxide finish for durability in wood, composites and plastics. 18MM INSTALLATION READY: 18mm diameter x 152mm overall length with 1/4" hex quick-lock shank. Designed for larger cable bundles and service runs requiring clean, consistent holes through joists and battens.