Versatile in its design, Wire Shelving can be customized to fit your space. These add on units attach to your existing shelving unit at a right angle or end-to-end to extend storage capabilities. Attaches to existing chrome wire shelving units for additional storage space Stores up to 800 lbs per shelf, evenly distributed Shelves adjust every 1" along posts 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.