General description A set of 3 universal joint bit adaptors designed to convert standard 1/4" and 5/16" shank bits to socket drive. These adaptors are ideal for use in confined areas, allowing for greater versatility in various applications. Technical specifications Material: Chrome vanadium Adaptor sizes: 1/4" D and 3/8" D 1/4" D universal joint adaptor takes 1/4" shank bits 1/4" D universal joint adaptor takes 5/16" shank bits 3/8" D universal joint adaptor takes 1/4" shank bits