Imperial Shelving is ideal for tab filing and makes files more visible when using a color-coding system, and more accessible by keeping them upright and orderly. Extra-large 7-1/2" high shelf dividers are adjustable in 2" increments and keep letter-size folders upright and contents intact. Steel shoulder rivets, combined with steel uprights and shelf supports, offer a 400 lb. capacity per shelf. Rigid framework requires no nuts, bolts or sway braces as potential obstacles so you can have easy access to files. Shelving features a unique keyhole slot design so shelves and supports snap together with shoulder rivets and assembly does not require tools. Attach any number of add-one units (sold separately) to create a row of shelves.