SK Hand Tools 4060 3/8" Drive 10pc Semi-Deep Fractional Impact Socket Set. Semi-deep sockets provide added reach over standard length sockets, yet allow access into areas where deeps won't fit. SK impacts feature the SureGrip hex design for greater strength, reduced fastener damage and effective use on partially rounded fasteners. Set includes: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" Semi-Deep Impact Sockets. Packaged on a metal rail.