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. * Chrome Vanadium Steel * 8 in 1 4 points, 6 points & 12 points on metric 6 points on SAE E-torque: E5, 8, 10, 12, 14, 16, 18 * 4, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13, 14mm