One 3/8-inch Drive XZN spline socket bit Heavy duty chrome vanadium construction Mirror polished socket, Heat treated hardened S2 steel bit XZN bits are specially used on all European vehicles Perfect to use with hand ratchet handles and torque wrenches This Capri tools XZN triple square spline socket bit is made of drop forged, heat treated chrome vanadium steel and durable chrome plated and it is built to last. XZN bits are specially used on all European vehicles and perfect to use with ratchet handles and torque wrenches. Socket bits are for hand tools only. Bit comes with limited lifetime replacement warranty provided by Capri tools.