Mount: 1/2-20UNF; Capacity Range: 2-13mm / 1/16-1/2 inch; Designed for Tough Jobs Constructed with metal for supreme durability. Applicable Scope: Suitable for 1050W power above impact drill. Quick-change SDS shank for electric hammer. Use on cordless drills and mains-powered drill drivers. Conveniently tighten with one hand with the exclusive one-sleeve design. The unique torque stop is easy to handle and apply, resulting in superior tightening. Quick-change SDS shank for electric hammer, instantly converts the impact driver into a non-quick-change drill bit holder.