The Bahco 9627 Series Long Combination Auger Bit is longer than a standard auger bit, designed for long-reach applications. Made from hardened tool steel, lacquered for rust protection. Spirals with Levin pattern. Can be used in both electric power drills and hand braces. 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.This Bahco 9627 Series Long Combination Auger Bit has the following specification: Size: 20mmWorking Length: 385mmOverall Length: 460mm