10pcs Premium Lever-Nut Wire Connector Kit, Bilateral 4-Hole Transparent Conductive Compact Wire Connectors, Compact Connector Spring Clamp, 40*13mm Good Safety Performance: Made of finest nylon flame-retardant insulating material. With the advantages of long lifespan, corrosion resistance, aging resistance, high pressure resistance, insulation and flame retardant, it can effectively prevent electrical leakage. So lever nuts are safer than traditional threaded nuts. High-Quality Internal Material: The inner shrapnel is copper material, special surface treatment preventing oxidation, low resistivity and better conductive properties. The spring clamp technology is reliable and does not fall off. Because the clamping force can be automatically adjusted with the thickness of the conductor, the contact of the conductor is reliable and is not affected by the installation technique. Easy to Use: Easy to install, no tools required. Just plug and play, and you're done. Each splice independent shrapnel, different wires are handled separately, different diameters can be connected securely. Built-in test point, electrical test without removing the tape. Technological innovations reduce wiring time by more than 50%. Wide Application: It is often used in building wiring, e.g., to control multiple lights with one switch. It is ideal for compact and complex applications. Practical: They are ideal for detachable connections as soldering is not necessary. Suitable for 0.08-4 mm² / 28-12 AWG copper wire. Connect all combinations of solid, stranded and flexible copper wires faster and more reliably. If you need to change other wires, just pull up the small lever and pull out what you need and replace it, which is very convenient. Note: All data are measured manually, please allow 1-3cm error, due to the difference in light and display, there will be some color difference, the actual object received shall prevail.