Features: 1. Working principle: The wall box screws often slip and fall on the wires and cannot be fixed, which is prone to safety hazards and needs to be replaced with a new wall box. And our products can solve this problem, no need to replace the bottom box, quick installation, long service life, and save money for you. 2. High-hardness metal material, hard nail heads, nail heads make the repairer firmly fixed and effectively prevent loosening. Corrosion-resistant, rust-proof, durable, non-bending, non-deformation. 3. General type 86, suitable for repairing most wall-mounted junction boxes. The adjustable range is 65mm to 85mm. 4. Allows you to correct frustration and isolate equipment through an easy-to-install design. There is no need to align the device screw with the extender hole, and then try to find the hole in the box. 5. Fast installation in 30 seconds, solve the problem of cassette installation, and have a long fixed life. Instructions: step: 1. Fix the long screw on the prosthesis (as an armrest) 2. Tighten the upper screw counterclockwise and the lower screw clockwise. 3. Remove the handle (long screw). 4. Put down On the switch panel, tighten the two long screws and you're done. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material: Stainless steel Weight: 300g(total) Color/Style: As the picture shown includes: 10 x cassette repair device 10 x screws 1 x wrench