Kings Brand Furniture Heavy Duty 7-Leg Adjustable Metal Queen, Full, Full XL, Twin, Twin XL, Bed Frame With Center Support, Rug Rollers, Locking Wheels & 4 Glide Legs To Replace Wheels Heavy Duty 7-Leg Adjustable Metal Queen, Full, Full XL, Twin, Twin XL, Bed Frame With Center Support, Rug Rollers, Locking Wheels & 4 Glide Legs To Replace Wheels. Ultimate in strength and durability, quality and structure. Two Locking wheels. Easy Assembly in Less than 10 Minutes. No Additional Tools Required. Features solid steel metal Frame that will give excellent support to your mattress and headboard. Easy to move, constructed with wheels, The Screws that attach the Bed frame to headboard are not included. Glides are recommended for wood, tile, and other hard surface floors. Designed to replace bed frame wheels - Pop out your casters, pop these in. These are a very common leg on bed frames, and can be used to replace lost or damaged ones. Please note that the center support bar does not work as a twin size bed.