Booklift Copyholder is specially designed for use with daily planners, large textbooks and reference manuals. Nonskid, easel-style base offers nine height adjustments to optimize your viewing angle. Two patented, adjustable page markers hold reference materials open at the desired location. Copyholder folds completely flat for compact storage and portability. Clip copyholder into standard letter-size or A4-size ring binder. Copyholder holds up to 10 lb. at a time.