Installation method: first use a screwdriver to pierce a hole at the position to be installed, put the screw head through the other side of the hole, then screw on the button, and finally use a screwdriver to tighten the screw. If the cloth is thick, please use a screw driver to drill and thread it several times. When threading the screw, press the bottom of the screw with your thumb, and press both sides of the hole with two index fingers to make the screw pass out quickly. This operation is helpful for quick installation.