Sturdy, self-contained storage system delivers mobility, accessibility and ease of use. Holds hanging clamps in pivot brackets for easy access. Base extends forward from 27 1/2" to 37 1/2". Large design supports up to 1,200 sheets in 12 hanging clamps (sold separately) to meet your filing needs. Rolls smoothly to wherever it's needed on four 3" ball-bearing swivel casters, two locking.