Package Deal - Swing Trainers - All 4 SizesThe Swing Trainer Package Deal Includes one of each: XL Swing Trainer Large Swing Trainer Small Swing Trainer Medium Swing Trainer The Swing Trainer: Straighten arm swing Promote straight back, straight forward swing Loosen arm swing for a smooth gravity fed swing A wobble in the back or in the front of the swing means you are grabbing or muscling Work on hand position and staying behind the Swing Trainer throughout the swing Improve balance and core