Easy to install, no tools required. Plug and play, then finish. Different wires are managed separately, different diameters can be safely connected. Built-in test point, electrical test no need to remove the tape. Technological innovations reduce wiring time by over 50%. They are ideal for removable connections as soldering does not need to occur. Suitable for 0.08 size copper wire~4mm² / 28~12AWG. Connect any combination of solid, stranded and flexible copper wire faster and more reliably. If you need to change other wires, just lift the little lever and pull out what you need and replace it, very convenient. Made from the best flame retardant insulation material Nylon PA66. With the advantages of long service life, corrosion resistance, aging resistance, high pressure resistance, insulation and flame retardant, it can effectively prevent electric leakage. So lever nuts are safer than traditional metal nuts. The internal spring contact is copper material, special surface plating to