Designed for use with planners, large textbooks, reference manuals or A4 binders. Easel-style nonskid base has nine height adjustments. Folds flat for storage. High-impact plastic. Hole-punched for portability (fits three-ring and A4 binders). Two patented adjustable clips hold pages open. Holds: A4; Legal; Letter; Mounting: Free Standing; Material(s): Plastic; Sheet Capacity: N/A.