Heritage Adjustable Bed Frame: Steel bed frame Queen size has a center support that fits side-to-side King size has a center support that fits head-to-foot Twin and Full sizes have no center support and 4 wheels Strong 1-1/2-inch angle side rails Oversize, offset and reversible brackets ensure a perfect fit with any headboard 2-1/4'' rug rollers (2 with locks) for ease of mobility Shur-Lock system adjusts easily and holds securely No tools needed for assembly Locking legs have a triple-thick steel layer Legs are recessed for more toe room when making your bed Backed by a lifetime, limited warranty Model No. 20R fits Twin and Full sizes; weight capacity 650 lbs Model No. KQ20R fits Queen, King and Cal King sizes; weight capacity 700 lbs