Original Putting Alley Putting Alley is a Short Putt Practice Device that Identifies Main Putting Errors which are Putter Face Angle Swing Path and Off Center Impact Eliminates uncontrolled practice on irregular turf by providing a precise consistent putting surface Easy to practice multiple putts in a short time and can be used anywhere has a built in ball loading slot with a simple push of the putter the ball sets at the same location and conveniently returns after each putt to establish a good putting rhythm. Two levels of a reversible precision insert to challenge various levels of putting skills (Heavy Weight Plastic Reversible Precision Alleys in One Inch and Half Inch) High strength engineering polmer plastic for precision and durability