The Adjustable Bed Rail installs in minutes with absolutely no tools! Simply choose among many height adjustments, including the leg and the rail, to match your bedframe, then slip the crossbar under your mattress. Our handy 11 1/2"H x 24 1/2"L bed rail also features two mesh pockets and a 4" x 14" built-in shelf, so you can keep your phone or even a glass of water within reach. Fits beds where foundation is between 16" and 21" from the floor. Rubber feet aid stability.