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Inspired by the Golden Ratio, the Phi is a beadless putter that is slightly less stable than the Penrose. It features a semi-deep profile with a smooth, rounded geometry that is stable enough to handle headwinds and tackle long approach shots with unmatched glide. Those looking to test out a beadless option for putting or a versatile and dependable driving putter, look no further – the Phi is the new golden standard of putt and approach discs.