MATTRESS SLIDE STOPPER: A combination of mattress anti-slip feature and headboard function, effectively preventing mattress sliding. THICK MATERIAL: Made of thickened high-quality steel, suitable for mattresses 8 inches or thicker, rustproof, and colorfast. EASY TO ASSEMBLE: Comes with all necessary screws and fasteners, requiring no special skills or tools for easy assembly and disassembly. AVOID SCRATCHES: Polished screws protect your mattress and bed frame from scratches, with additional self-tapping screws recommended for wooden bed frames. PACKAGING & CUSTOMER SERVICE: The package includes 4 mattress retainer bars and matching screws. Contact us immediately if you encounter any issues with the mattress retainer, and we will do our best to assist you. If you have any questions after purchasing our mattress slide stopper, please feel free to contact us and we will get back to you as soon as possible. Specification: Size:11*8 inch Material: Metal Color:Black Quantity: 4 pcs