Fitting: 1/2-20UNF; Capacity: 2-13mm / 1/16-1/2 inch; Designed for tough jobs. Made of metal for optimal durability. Application: Suitable for 1050W and above impact drills. Quick-change SDS shank for electric hammer. Compatible with cordless drills and corded drill drivers. Easy one-handed tightening thanks to the exclusive single-sleeve design. The unique torque stop is easy to handle and apply, for optimal tightening. The quick-change SDS shank for electric hammer instantly transforms the impact driver into a quick-change bit holder. Note: The data are all manual measurements. Please allow 1-3 cm error. Due to differences in light and display, slight color difference may occur, whichever is the actual object. Quantity delivered: (see main photo).