Usage Tips:[Mattress Retainer Bar Bracket]Dealing with a slipping mattress at night? Having to push back your mattress in place every morning? mattress retainer bar keep mattress from sliding, no more having to adjust the mattress daily [material]The mattress holder are made of thickened steel iron, with black painting, resistant to rust, colorfast and smooth, without deformation or breakage, which is secure for you to use repeatedly [Easy to install]No paper instructions, each metal mattress stabilizers comes with 4 screws, just put the screws through the installation holes, then use an electric screwdriver to drill the screws into the wooden bed frame to fix the mattress holder [Wide Application]Non slip mattress gripper fits for adjustable bed, RV bed, wood bed and other bed frame. Make sure the width of your bed frame mounting location is no less than 1.5 inches. Colour:black Material:Metal Size:260 x 90 x 80mm Package Contents: 2 x Mattress Slide Stopper 8 x screw 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.