Economy Shoulder Pulley Systems helps the user build range of motion and strength in the shoulders. As a ROM device, the stronger hand pulls the weak or affected arm up in a gentle, forward-stretching motion. Ideal for those building strength after recovering from stroke or surgery. To build muscle strength, use cuff weights. Overdoor Metal Bracket Model hooks over doors and stays in place without clamps. Plastic handgrips. Low-Profile Overdoor Bracket Model hooks to doors but doesn't interfere with door openings. Wood handles. Webbing Door Strap Model Door strap anchors pulley at desired height. No-slip webbing. Wood handles.