Elevate your bed and your readily available storage to new heights with these Adjustable Bed Risers. Merely screw the base plate into the bottom of the box spring with the offered screws then screw in the leg stem to create as much as 35 cubic feet of storage space under your bed. A trademarked slide permits for simple rotation of the box spring. Adjustable Bed Risers Includes Develops approximately 35 cubic feet of storage area under the bed. Depth of frame of box spring need to be at least 2 3/4 inches to mount effectively. Patented slide enables easy rotation of box spring. Fits any bed size consisting of heart shaped and odd sizes. Made from High impact polypropylene making it virtually indestructible. Sizes and Set Amounts For Bed Legs: 7 or 10 inch Twin Bed Risers Can be found in Sets of 6. 7 or 10 inch Queen and Complete Bed Risers Sets of 9. 7 or 10 inch King-size bed Risers Come Sets of 12.