1/2" Dr. Penta-Spline Socket Set (SAE, Metric, Torque) 19 PC 1/2" Dr Octa-Metric Socket Set Multi-Fit High polish finish, which protects the tools from the harsh working environments The Spline shape works on 8 fasteners (Spline, 6 point (metric.SAE), 12 point (metric/SAE), 30% rounded, square, E-Torx), and even on rounded fasteners The non-slip feature on the open end enables ease of use, and can be used on damaged fasteners 8 in 1 4 points, 6 points & 12 points on metric 6 points on SAE E-torque: includes sizes E8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 27, 30, 32 SPLINE SOCKET SET: The VCT 1/2-inch Spline Drive Socket Set is a set of 19 spline sockets; Constructed of CR-V steel, this small socket set is resistant to rust and it comes with a handy storage case for easy organization VERSATILE: Instead of conventional 4-point, 6-point, and triple square sockets, this spline socket set works for a variety of fastener sizes to be universal for your needs; Spline sockets help to deliver twice the torque of standard fasteners to give more strength to your workload; Ideal for high-torque applications such as removal of tamper-proof lug nuts, cylinder head bolts, and other engine bolts BUILT TO LAST: Constructed of Chrome-Vanadium Steel (CR-V) with a mirror nickel finish, these drop-forged, heat-treated 12-point sockets are resistant to rust and corrosion; This automotive socket set is designed for strength, longevity, and durability; This star tool set meets ANSI Standards