Impact-rated with ¼" hex shanks, making them suitable for use in impact drivers as well as all standard drills with a jawed chuck. There are 3 cutting spurs for cleaner and faster holes, the spurs also extend drilling life. Its full-screw tip allows the bit to self-feed, for ease of use and pull-through. For use with corded and cordless drills. Suitable for drilling holes in wood up to 100mm deep.