40 pieces socket wrench set, items included as follows:14 pieces 1/4" metric sockets: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 9, 10, 11, 12, 13 (mm)14 pieces 1/4" imperial sockets: 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 12/32, 7/16, 15/32, 1/2, 17/32, 9/16 (inch)3 pieces 1/4" 8 points imperial sockets: 1/4, 5/16, 3/8 (inch)2 pieces 3/8" metric sockets: 15, 16 (mm)One piece 1/4" to 3/8? adapterOne piece 3/8" 3 inches extension barOne piece spark plug socketOne piece 1/4" spinner handleOne piece 3/8" plastic padOne piece 3/8" ratchet wrenchAnd one plastic storage box.Good repairing tools for motorcycle, car, etc. especially for roadside emergencies.