The Dewalt DT7508-QZ impact adaptor has a hardened core for extra strength and durability and a flexible Torsion Zone absorbs torque peaks and reduces breakage (Torsion bits only). This 1/2" square to 1/4" hex adaptor converts any make of 1/2" impact wrench so it can be used as an impact driver Features The impact adaptor has the following dimensions: 1/2in (12.7mm) x 1/4in (6.35mm) For all screwdriving applications Thinner than wrench sockets for tough to access areas Large laser etched markings - easily identifiable Provides the impact driver user with a socket Designed for use in both corded cordless Impact drivers and wrenches solution.