The Rev Pro Softball helps give instructors and athletes alike instant feedback, so you can understand how to easily repeat a proper & powerful throwing motion. You can get a ton of reps to refine your arm path and movement patterns with little to no stress on the arm whatsoever. Practice your throwing without a partner. Helps the user understand what it feels like to throw healthy and effortlessly. Great for training arm path, strengthening arm through efficient movement patterns as well as a great warmup and cool down tool. It is also great to use as a way to keep arm loose in between innings for pitchers. Great for return to throw protocol after long break from throwing. </br></br> There is no product like it on the market today. Through arcs, circles and momentum, The Rev Pro Softball becomes a great teacher for the user. The drill is the instruction.... If movement patterns are incorrect it will feel right and the user can make instantaneous adjustments. </br></br> All over head throwers or anyone looking to warmup the shoulders and create rhythm and tempo which will allow movement of the shoulder joint to work smoother and more efficiently. ie: Baseball, Softball, Cricket, Water Polo, Football, Volleyball, Multisport Athletes.