Pure2Improve Putting Ghost Holes Set Of 4 Set up the ideal track for your putt by placing them along your intended line. An excellent training tool for improving understanding of putting breaks and the ability to read greens. Features Creates a ghost hole on any spot on the practice green. Thin enough for a golf ball to roll over seamlessly. The perfect tool for training on the golf course or at home. Use to plot out putting line or use as an aim.