Goodyear all-in-one 40 piece socket set includes 140mm spinner handle, 170mm ratchet handle, 3" extension bar, adaptor (1/4" drive to 3/8" drive) and 3/8" disc. Contains metric and imperial sockets, spark plug socket and spline sockets with extra strong rounded walls to grip bolts evenly reducing socket damage. - 1/4" drive metric sockets: 4, 4.5, 5, 6, 7, 8, 9, 10, 11, 12, 13mm. - 1/4" drive imperial sockets: 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", - 3/8", 13/32", 7/16", 15/32", 1/2" 3/8" drive - Metric sockets: 14, 16, 17mm. 3/8" drive - Imperial sockets: 9/16", 5/8“, 11/16" 3/8" drive - Spark plug sockets: 21mm (13/16") 3/8" drive - Imperial star sockets: 1/4" 5/16", 3/8"