RangeMaster fix shoulders. Their inexpensive, easy to use shoulder pulley is loved by over 200,000 people like you every year for resolving shoulder pain and restoring range of motion. Their pulleys assist you to stretch your shoulder in various directions to improve mobility—and ultimately the function—of your shoulder. Performing pain-free range of motion exercises with their shoulder pulley system are often the initial steps to restoring range of motion and function to your painful shoulder.