The revolutionary Ai-ONE urethane insert delivers more consistent ball speeds, even from off-center hits, leaving putts up to 21% closer to the hole. The Ai-ONE #1 is a traditional heel and toe weighted blade design with rounded bumpers and a crank hosel. The significant toe hang is best suited for strokes with more face rotation and arc. The putter features our Ai-ONE insert with an aluminum backer and White Hot urethane striking surface and the new SL 90 Stroke Lab shaft.