The Eyeline Edge Putting Mirror is the most used mirror on Pro Tours around the globe. It gives you full view of your setup and stroke: your eyes, putter face, and shoulders. We included slots for putter gate, ball gate, and release gate practice drills. The non-skid base makes it perfect for your practice on the green or in the office. Get an Edge with your putting The world\'s best players walk onto the putting green with the Edge, you can too  The Edge Putting Mirror gives you consistent setup:Putter Alignment Lines - Make sure you are aimed at your target and that your putter face is square to that line.Built-in Gate Drills - Test how your stroke is performing, and make the quick adjustments.Extra Durable - Non-skid polyethylene base and uniquely engineered design pro-longs mirror life and adds strength.