7-Leg Heavy Duty Adjustable Metal Queen, Full, Full XL, Twin, Twin XL, Bed Frame With Center Support, Rug Rollers and Locking Wheels. Ultimate in strength and durability, quality and structure. Mount the bed rail hangers. This hardware is essential in forming a rigid connection between all the bed rails in the frame. Secure the bed rail hangers to the end of the side-rail and head post. The Modern Sleep Heavy Duty Adjustable metal bed frame is a sturdy secure way to set up your bed. Designed with adjustable brackets that snap right into place it also gives you the option to set up your frame to any bed size, from twin to king. .