This product is made of metal, EVA. This adjustable thread bed frame anti-shake tool can be used in many places, as long as the center of gravity is unstable or easy to shake, such as bed. Cabinets, chairs, sofas, etc. are placed against the wall.<br> If you think that bed movement will not affect your sleep, you may need to think about it again! In fact, if you don't have proper support, the bed will make a loud noise when you sleep, but we have done a way to make the noise disappear. This product can improve your sleep quality, you deserve it!<br> Turn our threaded studs into place, you can change your bed frame in a few minutes, make your bed more stable, no need to worry about humming, installation Very convenient.<br>