1、 Size: The total length of each tool can be adjusted freely by the number of adjusting screws: 33mm, 47mm, 64mm, 84mm. Very easy to install. 2、 Packing: 4 adjustable bed frame anti-shake tools. The tool is equipped with protective pad and EVA protective pad to make your use more convenient. 3、 Material: The single-sided wall is made of high-quality EVA protective pads with a thickness of 3 mm, which is sufficient to effectively protect the wall from abrasion. 4、 Using bed frame anti-shake tools, you can repair furniture, prevent shaking, reduce household noise, and provide a quiet and comfortable home environment. 5、 As long as the center of gravity is unstable or the object is easy to shake, this adjustable bed frame anti-shake tool can be used in many places. For example, beds, cabinets, tables, chairs, sofas and other objects used on the walls. 4*Adjustable Bed Frame Holders   Material: Iron Adjustable length: 30-40 mm, 47-64 mm, 67-87 mm,  84-110 mm