Tabata Golf Swing Trainer - Easy to inflate, portable, for swing improvement. Training aid, swing practice machine, golf practice equipment. "Sankaku Sensei Fit" GV0366 Used only once for a short time. How to use: Attach to your arm and swing while holding it to practice your swing, approach shots, and putting. Keep your arm triangle intact while swinging. During your swing routine from takeaway to follow-through, focus on maintaining the triangle shape while practicing your swing. Will be shipped folded! Thank you for looking.