Safe ConnectionMulti-color lever nut connectors made of flame retardant PA/PC. It has the advantages of long life, corrosion resistance, aging resistance, high voltage resistance, insulation, flame retardant and so on. Can effectively prevent leakage. [High-quality conductor] The inner shrapnel is made of copper, and the special surface is electroplated to prevent oxidation, with low resistivity and better electrical conductivity. The spring clamping technology is reliable and does not fall off. For copper wire sizes 0.08-4mm / 28-12 AWG. Easy to InstallNo tools required, plug and play, greatly reducing wiring work time. Each connector has independent shrapnel, different wires are managed separately, and different wire diameters can be safely connected. Reusable ConnectorsThese are great for detachable connections as no soldering is required. If you need to replace other wires, just move the small lever up and pull out the wires that need to be replaced, which is very practical. Wide range of use Widely used in building wiring that requires space. Ideal for home and automotive applications. This is a great option for those working on electrical projects or jobs that require connecting lots of wires.