Easy Set-up Steel Platform Bed/Steel Bed Frame. The Roslindale is an All-in-One mattress support frame foundation with built-in headboard and footboard. Great for home use, dormitories and for temporary settings. For visiting family or friends, it is ideal for converting your spare room into a bedroom. Not to mention, setup is a breeze! Simply unfold and tighten the 4 support bolts. Once completed, place your chosen mattress and beddings – you are ready for a good night’s sleep! No box spring is needed. It is constructed using 100% steel to maximize support and durability and includes a 5-year manufacturer warranty. The Roslindale Easy Set-up Steel Platform Bed/Steel Bed Frame is available in Twin (77″x39″), Twin X-Large (82″x39″), Full (77″x54″), Queen (82″x60″) sizes.