1. Safety MaterialIt is made of nylon PA66 modified with high quality flame retardant insulation material, guide strip is electrolytic copper (surface tin plating); Which has the advantages of long life, corrosion resistance, aging resistance, high pressure resistance, insulation and flame retardant; The lever wire connectors can be used up to an ambient temperatures of 105°C, better conductive properties. 2. Universal compatibilityAre widely applied to connect any combination of solid, stranded, and flexible copper wires, ideal for compact and complex applications. Suitable for single strand hard wire 0.084mm/2812AWG, and the multiple strand flexible copper wire 0.082.5mm/2814AWG. They work with most every gauge of normal household wiring: sockets, switches, cars, loudspeakers, lamps, electrical boxes, chandeliers, fan controls, and much more. 3. Reliable ReusableLever wire connectors inline splices can be managed separately for different wires to avoid short circuit and fires caused by aging of the staggered band of the wires. It can be recycled several times and can be removed when not in use. 4. Easy to operateStrip wire lead to 910mm, open clamping unit and insert your wire lead, lower lever to close the clamp. Instead of traditional electrical tape and intertwined butt connectors, technological innovation reduce wiring time by 80%.