This is a simple and efficient prevention of mattress movement stopper, we specifically designed and produced for the bed frame factory. The quantity is two, equipped with screws, just need a screwdriver to tighten on the bed frame. Made of flat and thick metal, not easy to deformation, the treatment, strong and . Can be used for your home, vacation home, RV and other bed frame of sizes, to determine the size before purchase, and whether it is suitable for screw installation can be. color: Black material: metal Package Contents: 2 x Mattress Retainer Bar Keep Mattress Stopper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.