The irwin blue groove 6x stubby wood drill bit in 18mm diameter is designed for larger bore applications where space is at a premium. This 100mm length bit is ideal for creating holes for waste pipes, larger cable runs, and substantial fixings in timber framework and joinery. Delivering six times faster drilling penetration than a standard flat bit, the 18mm variant combines power with precision. The compact stubby design makes it indispensable when working between floor joists, in roof spaces, or any location where a standard-length drill bit would be too cumbersome. Features and benefits: 18mm diameter suitable for larger plumbing and electrical applications tri-flute design allows for faster chip ejection and cleaner holes full screw tip ensures ease of use and positive pull-through cutting spurs produce clean entry and exit with minimal breakout tapered flute reduces binding for smoother operation heat-treated construction for enhanced durability 100mm stubby length ideal for drilling through joists or in enclosed areas suitable for holes up to 50mm 2in deep specifications: diameter mm : 18 overall length mm : 100 working length mm : 50 pack qty.: 1