Evnroll TourStroke Trainer PutterPractice Mode - Instantly feel the perfect putting stroke. Set the putter 1” behind the ball. Then practice putting to the hole. You will automatically have a shorter takeaway. You will maintain a square putter face through impact and release the putter longer on the follow through.Player Mode - As a gamer, place the head directly behind the ball. This places your hands forward and presets your right wrist. Because the entire putter head is 1¼” away from the shaft the TourStroke has an effective MOI of 20,000. Unheard of stability. Amazing accuracy.