Compatibility: They are standard, universal headboard fittings with screw holes in the head/foot of the bed. These M8 headboard screws will stay in place without constantly tightening or moving the headboard. Strong hold: sturdy plastic head with stainless steel screws, durable and sturdy, not easy to wear and tear. The headboard bolt screws will hold your headboard firmly, you can sit and read, watch TV or relax in bed more comfortably. Special Design: Unlike fancy washers and bolts - The headboard bolts and washer fixings are molded in one piece so there is less chance of scratching the wall. They help keep the headboard secure and upright. perfect for tightening your headboard. Easy installation: screw the headboard brackets into the headboard. Find the pre-drilled holes on the box spring. Drill the bed frame fabric, screw the bed bolts into the hole and slide the headboard onto the bolt screw, tighten the bolt to secure the headboard firmly. Task completed. Note: The data is all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the 'actual item received.