1. Using our adjustable threaded bed frame anti-shake tool, you can keep your bed, cabinet, or sofa stable and prevent shaking and noise. 2. Headboard wall protectors are suitable for gaps between 1.10-4.50 in (30-114 mm). The bed frame anti-shake tool is made of iron, strong and reliable, and can withstand heavy pressure. 3. The bed stabilizer against the wall can not only prevent the bed from shaking but also reduce friction between the bed frame and the wall. With an EVA cushion and tape, it helps protect the wall from damage. 4. Bed stoppers for headboards can be used not only as a bed frame anti-shake tool but also for other furniture prone to shaking, such as sofas, bookshelves, tables, cabinets, and other wall-mounted items. 5. Adjustable bed frame anti-shake tools (screws) are packed separately and include double-sided tape and EVA cushion. They are sufficient to keep your bed from making noise and shaking. Size: Adjustable 84-110 mm Material: Metal Color: Black Package Contents: 4 x Adjustable Bed Frame Anti-Shake Tools 4 x Double-Sided Tape 4 x EVA Cushion Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. Measurement allows an error of +/- 1-3 cm.