Nicely machined metal bars; all the pieces fit together well. The bars inside were pretty dirty and dusty but I tried not to shake em too much. Literally all the screwheads wore out after the first tighten with an Allan wrench. Hope I can somehow retighten in the future.  Headboard smelled like vinegar, but seemed to fade after 2 days. Looks nice after being put together. Delivery from California took soooooo long. Headboard bends back if you rest on it. Wish it was a bit lower so it would provide lumbar support.