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The 3Bays GSA Putt (Putting Analyzer for Apple iOS) is a patent-pending innovation in golf putting technology. It captures the club head motion of your putter and sends the information instantly to your smart phone through its unique GSA PUTT app, which compares each club head motion from different angles simultaneously. It compares each putt against your best or your PGA instructor's best putt for greater accuracy. Key points: [+]