Golf Putting - Training Device
The device consists of a small ball rolling on a symmetric smooth curved surface. It is covered by a transparent cover. When placed on an uneven surface, the marble rolls to the lowest position it can ,which then indicates the slope to the golfer. The top surface has markings to indicate the angle of the slope relative to the putting line.
Size: 63 mm (2.5 inch) Round and 10 mm (0.4 inch) high
Weight: 1 oz
No batteries needed
Package includes instruction sheet