Mantua's CraftLock® bed frame series uses a wedge-lock style leg that makes the frame stronger as more weight is applied. High-carbon, ribbed steel side rails provide maximum support for the mattress and box spring. Additional foot clearance is added with the use of our recessed leg design. No nuts and bolts mean no tools are needed for assembly. The 166R fits King beds and includes a double center rail for increased stability. Six legs have nylong rug rollers for mobility. Two rollers have brakes to keep the bed in place when needed.