23-piece set including 2 extension bars (5, 10 inch), universal joint, 2 spark plug sockets (1/2x16, 1/2x21 inch), socket sizes 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22, 24, 27, 30, 32, universal joint, ratchet.