5 piece 100mm wood auger drill bits supplied in a reusable storage tube. Drill Bit Sizes: 12mm (15/32 inch), 16mm (5/8 inch), 19mm (3/4 inch), 22mm (7/8 inch) & 25mm (1 inch). Features three cutting spurs ensuring clean, precise hole edges in wood and MDF, drilling 6x faster than standard flat bits and minimising breakouts. Full screw self feed tip allows for easy pull through, reducing effort and enhancing usability. Tapered tri-flute design ensures faster chip ejection and reduced binding, with full-length heat treatment for extra durability. Grooved 1/4 inch hex shank fits both impact drivers and standard drill drivers, providing versatility for various applications.