The Sunex Tools 80-pc 3/8" Drive Master Impact Socket Set, No. SUN3580, offers many popular sizes of metric and SAE impact sockets. The sockets have radius corners on the hex and square drive, are forged from alloy steel and meet or exceed ASME specifications. The set comes in a blow molded case and includes six-point fractional standard and deep-well sockets sized 5/16" to 3/4" and metric sockets from 8mm to 19mm; fractional universal sockets from 3/8" to 3/4" and metric universal sockets from 10mm to 19mm; external star bit sockets E5 to E16 and internal star bit sockets from T20 to T55; extensions in 3", 5", 10" and 15" lengths; and a 3/8" drive universal joint that adapts any socket for use in swivel applications.