Zinus has reinvented the bed frame with this "compack" and easy-to-set-up base, uniquely designed for optimum support and durability. Visionary Design - The center bar support and 9-leg construction is unique to the Compack Bed Frame and ensures superior stability. Low-Stress, Easy Assembly - The Zinus Compack bed frame assembly requires no tools and sets up in four simple steps with each support bar featuring a quick-lock system. The 9 support legs are intelligently recessed for safety and helps you avoid hitting your toes when making the bed. Bed frames are meant to be used with a box spring and mattress set. Worry free 5 year limited warranty.