TheraBand FlexBar Yellow is ideal for wrist, forearm and hand rehabilitation, lateral epicondylitis therapy, and neuromuscular re-education after injury Clinically researched and proven to reduce elbow pain by 81% and increase strength in the tendons by 72% in tennis elbow patients, Tyler Twist with FlexBar is simple and works Ridged design is easy to grip and twist for elbow, wrist, forearm and hand rehabilitation and strengthening