Matco Tools 3/8 DRIVE 13 PIECE SAE 6 POINT DEEP CHROME SOCKET SET. Opti-TorqueT on socket end spreads the stress to the fastener sides instead of the corners; increasing the life of the fastener and socket. High Visibility markings provides size information at a glance. Cold formed manufacturing increases overall socket strength. Includes sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1.