Adaptors to allow the use of 3/8 inch square drive components with 1/4 ( 511-4148 ) or 1/2 inch ( 511-4160 ) sockets, Vanadium-extra alloy Drive Adaptors with polished nickel and chrome plated finish, Rozmiar napędu = 3/8 in, Typ = Adapter, Typ napędu = K