Extend the length of your wire shelving or create an L-shaped storage unit with add-on wire shelving. Design upgrades storage without sacrificing needed floor space Attaches to existing chrome wire shelving units to extend the length of shelves Accommodates up to 800 lbs per shelf, evenly distributed Shelves adjust every 1" along posts Made for indoor use, dry storage only S-Hook 2-Packrequired per extra shelf To securely set or quickly remove shelves, tap their corners with arubber mallet. View ourWire Shelving Size Guideto see actual outer and inner dimensions.