The irwin blue groove 6x stubby wood drill bit in 28mm diameter delivers exceptional boring capacity for large-scale timber drilling applications. This 100mm length bit is designed for creating substantial openings for waste pipes, large cable bundles, ventilation ducting, and heavy-duty fixings in wooden framework and structural timber. With six times faster drilling penetration than a standard flat bit, the 28mm variant provides the power needed for demanding tasks whilst maintaining the convenience of a compact design. The stubby format is particularly valuable when drilling through deep joists, working in loft conversions, or operating in any confined space where a standard-length bit would be unmanageable. Features and benefits: 28mm diameter perfect for large plumbing and heavy-duty 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 : 28 overall length mm : 100 working length mm : 50 pack qty.: 1