The ArmMaster is known for being inexpensive, lightweight and portable while solving your swing issues.  It consists of simple straps (including the center tension strap) that go just above your left and right elbows, helping you keep your upper body in a fixed position throughout the golf swing.  

If you are someone that suffers from a "Flying Elbow" at the top of your golf swing (see photo below of Flying Elbow) the ArmMaster will keep your right arm tucked like you see on TV, reducing the risk of further tendencies that come from that flying elbow!

(example of Flying Elbow) - Although, there are golfers that are able to play with the flying elbow, it is not recommended because more times than not, it will cause tendencies in the downswing that are tough to overcome!