Bought this unit to add some shelves on top of a filing cabinet. Fits perfectly lengthways and provides really solid easy to assemble shelving to add storage that I needed for some fairly heavy items. I stuck 4 coin sized magnets (that I bought seperately) to the feet with epoxy resin which sticks the shelves firmly to the filing cabinet but still allows it to be moved if required. Obviously this is not the inteded purpose of these shelves but it works perfectly and was quick and easy to assemble. Also its a very sturdy well made unit. Have just ordered a second one as it works so well for my purposes.