EZ-Lift EL2-18 Steel Bedding Support System, 3 Cross Supports, 2 Legs Each Versatile: The EL2-18 is adjustable in width from 47-3/16" to 78-1/8", meaning it will accommodate many sizes of beds, including Three-Quarter, Super Single, Full, Queen, King, and California King. The EL2-18 is height adjustable from 7-1/8" to 17-5/8". This support system features two adjustable legs per cross support, with three cross supports, for a total of six legs under your bed. The Cam Lock Assembly is fast and easy. It assures the chosen width is locked-in with a securing plate and bolt for a perfect fit. This mattress support system is designed for use on angle steel or wood bed rails. Installation is easy using the pre-drilled holes in the ends of the cross support. Simply screw the cross support into your wooden side rails, or bolt it to your steel rails, to ensure a reliable and sturdy support. This all-steel support is proudly manufactured in the the United States under strict quality control for a reliable lifetime of use.