CanDo Visualizer Shoulder Exerciser By Roscoe Medical. Cando Visualizer shoulder exerciser. The CanDo Over-Door Shoulder Pulley Exerciser provides a convenient platform for resistance exercise that increases range of motion in the arms. Great for therapy and low-impact strength treatments. Over-door shoulder pulley with single pulley and door jamb anchor nub (50-1035) or bracket (50-1036), used to increase shoulder range of motion, visualizer rope allows user to achieve specific pre-defined levels of ROM, color-coded by ROM from yellow (least) to black (most), each exerciser comes standard with instructions pamphlet and retail packaging.Product Specifications•Provides a convenient platform •Resistance exercise that increases range of motion in the arms. •Great for therapy and low-impact strength treatments. •Over-door shoulder pulley with single pulley and door jamb anchor nub Size and Quantity•Each - With Pulley and Anchor Nub.•Each - With Pulley and Door Bracker.