Insulated cable lugs for terminating and splicing wires. They are made of the highest quality galvanically tin-plated copper. The insulation of the ring terminal is a layer of polyamide, which, compared to e.g. PVC, is more resistant to mechanical damage, e.g. cracking. This material allows the operation of such a connection in a wide range of temperatures. The soldered connection of the mounting sleeve and the special design of the terminals (easy entry) facilitates the application, fixing and crimping of wires in the terminal. The use of ring terminals compared to, for example, soldering wires, reduces the risk of a frequent phenomenon - overheating of the cores, and thus increases the safety and life of the devices in which they are used.