When it comes to missing putts, the real culprit is improper face angle. According to research by sports biomechanics professor Sasho MacKenzie:

"Golfers have only a 0.7-degree margin of error with their putter face when attempting a straight 12-foot putt. If the face angle is open or closed by more than 0.7 degrees, it results in a missed putt. Surprisingly, stroke path has a minimal impact on making the same straight 12-footer. So, focus on keeping that clubface square!"

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Why is a Level Putting Plane So Important to Good Putting?

Consistency
Consistent ball striking is achieved when your putter moves along a level plane.  This consistency allows for better distance control and direction, two key elements for sinking more putts.
Accuracy
A square putter face reduces the chances of misalignment and refines your ability to start the ball on the intended line.  A level putting plane helps with this alignment.
Stroke Path
Maintaining a level plane helps in achieving and maintaining a stroke path with a slight arc or straight-back, straight-through stroke.  This is a much more reliable and repeatable stroke path.
Impact Efficiency
A level plane ensures that impact occurs with the ideal loft and angle.  This creates maximum efficiency of energy transfer at the moment the putter face meets the ball.
Reduced Variability
More predictable putting outcomes are accomplished by practicing and instilling a level plane.  Inconsistency from a level plane creates variability into your stroke causing more missed putts.
Predictability
A level putting plane creates a smooth and predictable ball roll.  This allows for improved gauging of distance and speed.

In summary, the Roll-N-Roll™ Putter instructs and conditions you to have a consistent and level putting plane.  This serves as the foundation for an accurate, efficient and effective putting stroke.  You will immediately notice an improved ability to judge distance and control the starting line of your putts, both imperative aspects of successful putting in golf.