Bahco 9526 Combination Auger Bits are dual-purpose and can be used in both electric power drills and hand braces. With a single cutting edge for easy regrinding, though the need for regrinding is reduced as it is made from hardened tool steel for a longer cutting life. The threaded tip moderates a self-feed when using a power drill, but still sufficient self-feed when used in a hand brace. For quick precision cutting with all types of wood.Diameter: 28mm.Length: 210mm.