Specification: Type: Bed Slat End Cap Holder Inner length: 57mm/2.24" Inner height: 9mm/0.35" Material: Plastic Color: Black Package includes: 30 x 57x8mm Plastic Bed Slat End Caps Holders These retainers are mounted on the side of the bed frame and on the center support rail using pins, which you can use pre drilled holes to secure to the bed frame Made of plastic, abrasion resistant black, suitable for all types of bed board If the size is right, no additional tools are required to install. Place the bedplate in the bracket and align the plastic pins with the mounting holes These plastic covers are ideal repair and parts for metal beds, leather beds, wooden beds, sofa beds, bunk beds, etc Suitable for mounting spring plank with width between 57mm and thickness of 8mm