Socket tool for added ease with installing single C9/C7 light sockets and snap on plugs Indoor and Outdoor Rated Weight rating of 330 LBS (Heavy Duty Locks) Cantenary Wire Diameter of 3MM Works great for repairing C9/C7 light sockets and connecting snap on plugs in adverse weather conditions This replacement socket wrench is used to install sockets onto bare wire. This tool makes it's effortless to clip the two replacement socket pieces together onto the socket without breaking the socket, or damaging the wire. Turn the socket tool over and use the grip ends to attach male/female sockets onto ends of wire.