California King size metal bed frame, EXTRA HEAVY DUTY with large 2 1/4 inch plastic wheels. This frame includes a cross support down the middle with two additional support legs. No tools needed for assembly. This frame comes with brackets at the head of the bed to use with a bolt-on headboard if you wish, it is not necessary. The bolts for the headboard are not included. This frame will lift the box spring off the floor 7 1/2 inches.