The Cutting Unit Rack has an under slung bottom shelf, fully adjustable intermediate shelves and a fixed top shelf that is just over 4 feet high. This allows it to store up to 11 cutting units in a very compact design. The casters are industrial grade and make it easy to roll the rack around in your shop. It is designed to perfectly compliment both the Peerless 7000 Reel Grinder and the Simplex 500E Lift Table.