Designed for both indoor & outdoor use, the Putt Out Pro Putting Gate set offers three separate sized targets that get smaller & tougher while you get better & more proficient with practice. The set comprises of three gates, 50, 60, 70mm to refine your putting stroke. At only one foot away from the hole, a one degree open or closed putter head will see your putt missed or lipped out. If you're up for a challenge, place all three gates along the line of a breaking putt & see if you can negotiate all three while sinking the putt with glee.