Usage Tips: Product Description Features: 1. No skidding, quick back nail 2.Three-piece structure, not stuck 3. The riveting is firm and burr-free. 4. Strong bite 5. Home decoration, Automobile industry, riveting of railway airlines Installation method: 1. Adjust the electric drill to the correct speed, open the chuck and insert the conversion chuck. 2. Turn the gripper head forward and turn it over. When you hear the sound of the click, place the rivet in the correct size. 3. Open the positive rotation function of the electric drill, align the hole and the punch in the rivet. 4. Turn the electric drill to the reverse function and remove it from the rivet. Specifications: Material: Plastic Packing size: 230 * 135 * 40mm / 9.06 * 5.31 * 1.57 " Notes: 1. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color shown in the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement.