Package Content: 100pcs D-rings and 100pcs screws They can be used to hang pictures, paintings, clocks, decorations, lights, kitchen utensils or even clothes. Reduce Wall Damage: After removing the professional hanging kit, only small nail holes are left and can be easily covered with paint. Tiny invisible nails can be reused. All you need to do is place the hook on the wall and use a hammer to drive the nail into the wall. The domed top of the hooks protects your fingers from injury. You can use a drill to make a hole first if you have difficulty in driving the nail into the wall. Note: The data are all measured manually, please allow 1-3cm error, due to differences in light and display, there may be some color differences, please refer to the actual item received.