Steelock® Adaptable Hook-In Headboard Footboard Bed Frame King Steelock® super-duty bed frames are guaranteed to last and come with a lifetime warranty. Every aspect of the Steelock® bed frame is reinforced with the best engineering and heavy-duty steel necessary to securely support any mattress and accommodate any headboard. This frame features a 2.5-inch double rail center brace and full-length siderails. Four modification plates allow for a secure connection to hook-on headboards and footboard. The plates can be micro adjusted to accommodate virtually any headboard/footboard, and adjustable-height glide feet provide custom support for any bed. L : 84 - W : 6 - H : 6 - W : 41