Standard Fit for Headboard & Footboard Sized for most standard bed frames and headboard/footboard mounting holes, suitable Designed to fit bed frames, headboards, footboards, and various wooden furniture, including bunk bed ladders and bed posts. Crafted from steel with an electrophoresis black-plated finish, ensuring rust and corrosion resistance for long-lasting use,Heavy Duty Solid Steel Construction Made with thickened heavy-duty steel for strong load-bearing capacity, withstands long-term daily use and bed frame movement, helping maintain stable connection performance. Complete Hardware for Straightforward Installation The package includes all necessary mounting screws and hardware; no extra separate parts purchase is required, installation can be completed with common household tools,Features multiple slots for adjustable sizing and an offset mounting design, easily assembled using just a screwdriver, without mortise requirements. The design accommodates a lateral distance limitation of up to 6.3 inches between the bed frame and headboard, catering to a broad range of headboard widths. Distance Between Long Slots: 3.5 inches. Distance Between Short Slots: 1.5 inches, Wide Household Bed Frame Compatibility Suitable for twin, full, queen and other standard size bed frames, ideal for bedroom furniture upgrade, bed frame modification and daily hardware replacement projects.