3/8" Sq.Dr. DEEP Impact Sockets, 6PT/MM: 1) DEEP LENGTH 2) ... SIZE, RANGE: 7MM-22MM 3) ISO9001:2000, CCC 3/8" Sq.Dr. DEEP Impact Sockets, 6PT / MM Specifications:7, 8, 9 ... your best choice.Thanks for visiting our website!! 3/8" Sq.Dr. DEEP Impact Sockets, 6PT/MM