Feature: 1. KEEP STABILIZATION: You can insert it into the bedside to keep the mattress stable, effectively avoiding the mattress sliding to disturb your sleep, allowing you to enjoy a more comfortable sleeping experience. 2. UNIVERSAL DESIGN: The anti slip mattress holder is adjustable in width and can be adjusted to a maximum width of 1.38 inches, which is suitable for most bed frames. 3. AVOID SCRATCHES: It locks the mattress firmly to the bed frame and protects the bed frame from scratches at the same time. And the recessed round head screws will not scratch the mattress as easily as the wing screws. 4. EASY INSTALLATION: The anti slip mattress gripper is easy to assemble and install with round head hex screws and a small wrench. Users can easily complete the whole installation process. 5. PREMIUM MATERIAL: Made of thickened premium carbon steel material, it can withstand strong pressure, not easy to deform or rust, has good durability and ensures stable support effect for a long time. Specification: Item Type: Anti Slip Mattress Gasket Material: Carbon Steel Weight: Approx. 1350g / 47.6oz Size: Approx. 8x7.5cm / 3.15x2.95in Adjustable Width: 0.8-3.5cm / 0.3-1.38in. Package List: 6 Sets x Anti Slip Mattress Gasket (12 Parts)12 x Screw1 x Hex Wrench