Installation method: first use a screwdriver to puncture a hole in the position of the installation, the screw head through the other side of the hole and then turn on the button, and finally use a screwdriver to tighten the screw. If the cloth is thick, please use the screwdriver screw drill hole and wear several times continuously. When wearing the screw, press the bottom of the screw with the thumb, and press both sides of the hole with two index fingers to make the screw wear out quickly. This operation is helpful for rapid installation.