41-Piece socket set, chrome vanadium steel. Contains 9 SAE sockets 1/4" drive: 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 1/2"; 12 metric sockets 1/4" drive: 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm; 7 SAE sockets 3/8" drive: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"; 7 metric sockets 3/8" drive: 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, 19 mm; 2 spark plug sockets, 3/8" drive: 5/8" and 13/16"; 1 adaptor 3/8" F x 1/4" M; 1 spinner handle 1/4" drive; 1 extension 3"; 1 reversible ratchet and 1 molded storage case. Lifetime warranty.