STEELMAN PRO 78538 5-Spline 5/8-Inch Locking Lug Nut Socket REMOVE LOCKING NUTS - Designed to easily remove spline style aftermarket lug nuts 5-SPLINE SOCKET - Key has a 5-spline 5/8-inch socket design that fits snugly around corresponding security lugs BUILT TO LAST - Made of heat-treated chrome vanadium steel and finished with corrosion resistant black oxide to hold up to a lifetime of use THIN WALLED - Socket style lug key features a thin-walled design to more easily fit lug nuts without damaging wheels EXTRA LONG DESIGN - Lug key is constructed with an extra-long design to keep wrenches away and prevent nicks and scratches DOUBLE-HEX HEADS - Key head is designed to fit both 13/16 and 7/8-inch sockets and lug wrenches