A very useful set of short pattern (120mm) auger bits. They have 1/4" hex shanks for a quick change in 1/4" hex chucks. The shank’s hexagonal cross section ensures a positive grip when used in a conventional 3-jaw chuck. These auger bits are very handy when you need to run a cable or pipe across several joists. The short length enables you to get between the joists. These bits cut fast and clear the waste quickly. The cutting spurs give you a clean breakthrough. Ideal for use in cordless drills, the short body length means as little friction as possible when drilling thereby maximising your battery's power. This set consists of both 16mm and 25mm sizes.