Available in sizes to fit any mattress from Twin to California King, the INST-A-MATIC Bed Frame is constructed of the super strong metal with 1.75-inch side rails. It has deeply recessed legs for safety and extra toe room, and protective end caps protect against rips in your bedding or scratches on your legs. It's ready for headboard attachment, and assembles so easily thanks to the wedge-lock design. The Twin and Full-size frames each feature four legs, each with a carpet roller. The Queen, King and California King frames all have six legs with carpet rollers. Two carpet rollers on each frame have brake locks to keep your bed in place.