Putter Wheel is designed to replicate the size, weight and feel of an actual golf ball. Uniquely engineered to be highly sensitive to miss-hits, resulting in wobbling and curving off the intended line providing instant feedback. The red beveled edges make getting your eyes directly over the ball fool-proof. The corresponding alignment template is also an important part of the Putter Wheel system. Comes with three Putter Wheels, one Alignment Template and drawstring carry bag.