Features:* Anti-Shake function: used to fix the bed frame, anti-shock adjustable threaded tool, which will keep you safe. *Material: Made of iron, durable and sturdy. *Wall Protection: Custom design is easy to stick and will not damage the wall surface. * With felt, it can effectively reduce the noise and protect the wall from damage and prevent the bedrock from shaking. *Application items: the center of gravity is unstable or items can be easily shaken. * Such as items against the wall such as beds, cabinets, chairs and sofas. * Occasions: Easy to install. Suitable for bedroom, hotel etc. Prevent the bed from squeaking and improve sleep. Specification: Material: iron, plastic Color: bronze, silver S: adjustable 28mm-38mm M: adjustable 38mm-46mm L: adjustable 46mm-56mm Package content: 1pc x tool frame 1pc x felt 1pc x tape Note: 1 .The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.