This item for sale is for a 4 pack of Putt Maker Putting Discs from Bent Grass Concepts. Putt Maker Putting Discs were used by the U.S. team in the 2010 Ryder Cup. These discs are white, with black print. Putt Maker Putting Discs from Bent Grass Concepts is a putting practice training device.Putt Maker Putting Discs are like movable golf holes or portable putting targets that fit easily in your golf bag. The discs are designed for use on the practice green, but they can also be used at home or in the office for visual feedback, so you will know when you made the perfect putt.Putt Maker putting discs are like movable golf holes.Create a personal putting area on the practice greens.Gain visual and audible feedback as your ball rolls over the discs.Perfect for pre-round practice.Fits easily in your golf bag.What they are: For use on practice greens, in home or office; Audible and visual feedback when a putt is rolled over a disc; Fits inside any golf bag; Can be used by individuals, caddies, pros, and junior golfersHow to Use:· Putting a ball so that it stops 18 inches past the disc maximizes the odds of the putt being made· A ball rolling over a disc will produce a "kerchunk" sound that provides audible and visual feedback as to the proper speed of the putt Where to Use:You want to putt on a specific area of the practice green; On green where there are none or not enough holes; You want to practice at home or office; You want to practice a specific type of putt like hills, breaks, or specific distances; You want your own personalized putting areaWe have a FREE (not included in shipment) Putting Instruction Drills Booklet with 17 unique drills on http://bentgrassconcepts.com/files/PuttMaker_Booklet_FINAL.pdf to help you master your putting stroke. With 3 balls our drills provide up to 48 putts of repetitive putting practice per pattern