Add instant storage space beneath beds using the Bed Risers - Adjustable System. The set includes eight blocks in two different heights that can be combined for a full eight inch rise, or used as five or three inch risers. They fit together mechanically and require no tools to assemble. Just stack and lift the bed legs or casters onto them. The bed risers are made of impact-resistant plastic and have a recessed cup to contain the legs. They are non-marring and you'll love the added space they make beneath your bed. Some handicapped or older people may benefit from a higher bed, as it can be difficult to get up off of low ones, which gives an added function to the Bed Risers - Adjustable System. Bed Risers - Adjustable System Features Raise bed to three different heights: 3, 5 or 8 inches. Contains 8 pieces - 4 are 5-inch and 4 are 3-inches Risers. Risers may be combined for a total of 8 inches added height. Make under-the-bed storage space by raising your bed. Perfect for elderly people as it is often easier to get in and out of bed. No tools are required for installing. Non-marring, semi-rigid, high-impact plastic. Made in the U.S. Recessed cups hold leg or casters.