This Proxxon 47 piece Compact Socket Set is supplied with an industrial quality 3/8" drive ratchet handle. The tough moulded case also contains a selection of 3/8" drive sockets from 6 to 24mm plus deep sockets from 10 to 17mm. Included are spark plug sockets in sizes 16mm, 18mm and 21mm. The additional accessories include a T-bar and 2 extension bars. There are also screwdriver bits with square drive for hex screws from 4 to 10mm and TORX screws T20 to T40 and finally five hex keys 1.25, 1.5, 2.0, 2.5 and 3mm.