In case of coil change and accidental breakage of the wire it is necessary to practice a junction, which shall be simple, fast and durable. To make the junction quickly and with a reduced overlap of the wire, there are special copper or aluminum clips, in which both ends of the wire shall be threaded to be joined up and secured with special pliers, or simply by inserting the two wires. They are sold specific wires junction clips, which can be quickly implemented, allowing the subsequent stretching of the wire, which can slide in one direction only. In case of ropes, the joints are made with special clamps.