【Easy to Use】 No tools are needed to connect wires. Just use your hands. First, strip the cable sheath 9-10 mm and make sure the wires are connected to the end. Push up the orange levers to 90° and connect the wires (Please do not open the cable sheath for too long) and reattach the clamp. When making an electrical connection, you only need a little force to push up the levers. 【Safe and Reliable Terminal Blocks】 The housing of the quick electrical connector bar is made of high-quality PC insulation material (shell) and 8 mm thick copper (inner conductor material). With the advantages of long service life, corrosion resistance, high temperature resistance and aging resistance, the automatic electrical connector can effectively prevent electrical leakage. 【Practical and Space-Saving】 The electrical terminal block is a reusable and creative connector, it has a special and scientific design, which effectively saves space. And when you combine the cables, you don't have to worry about twisting between the cables. Automatic terminal blocks help you make a clean and beautiful house. The PC material is transparent. You can clearly see the inside of the terminal block. 【Universal Terminal Block】 2 holes (30 pcs), 3 holes (20 pcs), 5 holes (10 pcs) meet different models. Even if you only need to install 4 cables, you can also use a 5-hole cable. They are suitable for 0.08-2.5 mm² solid and stranded conductors and 0.08-4 mm² flexible conductors. Rated voltage 250V, rated impulse 4KV, rated current 32A. It can work stably and continuously at 105°. 【Convenient for Inspection】 You can check if the cable has the correct length, if it is fully inserted or not through its transparent cover. It is easy to check if the cables connect the socket or not. In addition, there is a test hole on the back of the electrical connector. The test hole can be used to check if the cables are powered or not. All types of standard test probes can be used in the electrical domino lever.