146G - Full Premium Craft-Lock Bed Frame 1 3/4" high carbon side rails, 71" long sides, 4 legs with Steel stem glides The Mantua Craft-Lock® Series, which is constructed from recycled railroad steel, is designed for strength and endurance. The Craft-Lock has several important features: the wedge-lock leg makes the frame stronger as more weight is applied, the recessed legs allow for additional foot clearance and finally, the 1-3/4" high-carbon ribbed steel side rails provide maximum support for the mattress and box spring. No nuts and bolts mean no tools are needed for assembly. Lifetime Limited Warranty. Made in the USA.