Contents of the 171-piece socket and bit set case: 3 Ratchet wrenches of 1/4″, 1/2″, and 3/8″ 7 Allen keys 17 Short hex socket bits of 1/2″ in 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27, 30, and 32 mm 10 Short hex socket bits of 3/8″ in 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 mm 13 Short hex socket bits of 1/4″ in 4, 4.5, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14 mm 13 Short female Torx head sockets E4, E5, E6, E7, E8, E9, E10, E11, E12, E14, E16, E18, E20, and E24 3 Spark plug sockets of 16 mm, 18 mm, and 21 mm 1 Articulated ratchet adapter of 1/4″ 1 Articulated ratchet adapter of 1/2″ 1 Articulated ratchet adapter of 3/8″ 1 Socket holder adapter 1/4″ 1 Ratchet extension of 1/4″, 10 cm 1 Ratchet extension of 1/4″, 5 cm 1 Ratchet extension of 1/2″, 12.5 cm 1 Ratchet extension of 3/8″, 12 cm 1 Ratchet extension of 1/2″, 25 cm with sliding head