Sunex's 1/2-inch drive 17mm covex extra thin wall Mercedes Benz wheel lug socket is designed for safe and effective removal of the convex (flower head) wheel lugs on late model Mercedes S, GLK, and CL class and Maybach vehicles. Its precision design eliminates the need to replace the mangled lug nuts left behind by standard wheel lug sockets, and all Sunex impact sockets meet or exceed ASME specifications. Forged from chrome-molybdenum alloy steel for maximum durability, radius corner square drives come standard to extend the life of the socket.