Klutch Mechanic's Tool Set - 305-Pc., 1/4in.-, 3/8in.- and 1/2in.-Drive, SAE and Metric 1/4in.-drive set contains: 23-pc. set with SAE 6-pt. standard sockets 5/32in.-9/16in. and 4mm-13mm, 20-pc. set with SAE 6-pt. deep well sockets 3/16in.-9/16in. and deep well 4mm-13mm sockets, universal joint, quick release ratchet, spinner handle, 1/4in.-3/8in. adapter, 3 extensions and 1/4in.-drive hex coupler3/8in.-drive set contains: 11 SAE 6-pt. sockets 1/4in.-7/8in., 10 SAE 6-pt. deep well sockets 5/16in.-7/8in., 17 metric 6-pt. sockets 6mm-22mm and 12 metric deep well sockets 8mm-19mm, 19- 3/8in.-drive set contains: 11 SAE 6-pt. sockets 1/4in.-7/8in., 10 SAE 6-pt. deep well sockets 5/16in.-7/8in., 17 metric 6-pt. sockets 6mm-22mm and 12 metric deep well sockets 8mm-19mm, 19-pc. bit socket set, plus quick release ratchet, flex handle, 3 dual position extensions, universal joint, 2 adapters and 5/8in and 13/16in. spark plug sockets1/2in.-drive set contains: 13 SAE standard sockets 7/16in.-1 1/4in., 13 SAE deep well sockets 3/8in.-1 1/2in., 19 metric sockets 10mm-32mm, 14 metric deep 1/2in.-drive set contains: 13 SAE standard sockets 7/16in.-1 1/4in., 13 SAE deep well sockets 3/8in.-1 1/2in., 19 metric sockets 10mm-32mm, 14 metric deep well sockets 12mm-27mm, quick release ratch