Easy to install, no tools required. Plug and play, then finish. Different wires are managed separately, different diameters can be connected safely. Built-in test point, electrical test without removing the tape. Instead of traditional electrical tape and twist-type electrical butt connectors, technological innovations reduce wiring time by more than 50%. They are perfect for removable connections as there is no need to solder. Suitable for copper wires of size 0.08～4 mm² / 28～12 AWG. Connect any combination of solid, stranded, and flexible copper wires faster and more reliably. If you need to change other wires, you just need to lift the small lever and remove what you need and replace it, which is very convenient. Made of 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 retardancy, it can effectively prevent electrical leakage. Lever nuts are therefore safer than traditional metal nuts. The internal spring contact is made of copper, a special surface coating to prevent oxidation, low resistivity, and better conductive properties. The spring clamping technology is reliable and does not fall off. Since the clamping force can be automatically adjusted with the conductor thickness, the conductor contact is reliable and is not affected by the installation technology.