3/8" Sq.Dr. DEEP Impact Sockets, 6PT/MM: 1) DEEP LENGTH 2) MM SIZE, RANGE: 7MM- ... 3) ISO9001:2000, CCC 3/8" Sq.Dr. DEEP Impact Sockets, 6PT / MM Specifications:7, 8, 9, 10, 11, 12, 13 ... for the best combination of strength and impact resistance.Optimum wall thickness design for strength and access on fasteners having restrictionsAll ... for visiting our website!! 3/8" Sq.Dr. DEEP Impact Sockets, 6PT/MM