7-Piece Impact Power Extension and Socket Adapter Set. Chrome vanadium steel construction. Spring loaded detent ball and chamfered ends to provide a secure fit into sockets. Set includes 1/4", 3/8", 1/2" Dr. Power socket extensions w. 1/4" hex shank. 1/4"(F)x 3/8"(M) and 3/8"(F)x1/2"(M) adapters. 3/8"(F)x1/4"(M) and 1/2"(F)x 3/8"(M) reducers. Meets ANSI Standards.