General description You will receive 100 frame rotary knobs and 100 matching screws, which is enough for long-term multiple use. These rotary knobs can be used to fix photo frames and the back of pictures, keeping the photo stable, or to secure small pendants or accessories. Technical specifications Material: High-quality iron with a black coating Knob size: 23 x 6 mm Installation Use the corresponding screws to fix the knobs Easy to disassemble and can be used repeatedly Usage Fix photo frames and the back of pictures Secure small pendants or accessories Other information Note: The data are all manually measured, please allow 1-3 cm error Due to differences in light and display, there may be some color differences, please refer to the actual item received