The Thera-Band Shoulder Pulley is a shoulder exercise device specifically designed to assist patients undergoing shoulder treatment and who need to exercise to regain shoulder mobility. Unlike traditional shoulder exercise devices (pulleys), the Thera-Band Shoulder Pulley has a special elastic cord that is divided into sections marked in black. These markings allow the user to identify their current position during the exercise. Seeing the patient or user performing shoulder exercises or physical therapy progress from one black dot to the next allows them to understand the increase in their range of motion. The black markings on the Thera-Band Shoulder Pulley also indicate where the user should start and stop movement. These markings are designed to help the user perform shoulder exercises in a controlled manner. Patients can see their progress with the markings on the Shoulder Pulley. This increases their motivation. The colors on the Thera-Band Soulder Pulley indicate the level of stretch/difficulty, just like the Thera-Band exercise bands. It is very easy to use and you just need to attach it to the door before starting the exercises. It is recommended by physical therapists and doctors. You can use the Thera-Band Shoulder Pulley at home or in physical therapy centers. Do not start using it without reading the user manual.