1/2" Square Drive 13 Piece 12-Point Metric Chrome Hand Socket set 10-22mm Input Drive Size: 1/2" Drive Shape: Square Type: 12 Point Socket Set Includes: 4405M 12 Point Sockets: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22mm Metal Case: W168xH60xT42mm