One person can freely fold-out or up the bed. Inside 5 premium springs, high rebound strength to ensure the whole process. Compatible with 120-cm width or below the sized bed. Accept twin-sized bed & mattress with 2 stainless steel legs, just adjust the number of springs to change tightness. Manufactured with weighted iron, chromed surface, never broken and lasts long service time. Smooth bed in & out with durable copper axis. Quite space-saving for home or limited room, like lofts, single flats, modern hotel, etc. Get a quick bed when there's a need. VEVOR