Description: How to Use. Use double-sided tape to stick the red edge of the base to the head of the bed, and then twist the black edge of the EVA pad by hand until it is against the wall. Easy to Install. Adjust the length as needed, just screw the headboard stopper in place, and you can easily change the stability of the bed frame in just a few minutes. Wall Protection. EVA cushion effectively reduces noise and protects your wall from damage, this headboard stabilizer can prevent the headboard from shaking. Multiple Uses. This adjustable threaded bed frame anti-shake tool can be used in many places, as long as the center of gravity is unstable or objects that are easy to shake can be used. Objects used against the wall such as beds, cabinets, chairs, sofas, etc. Specification: Color: Black Material: Metal Size Chart: Diameter: 38mm/1.50inch S: 30-40mm M: 47-67mm L: 67-87mm XL: 84-110mm Package Includes: 1 Piece Threaded Bed Frame Anti-Shake Tool Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!