Odyssey Ai-ONE Square 2 Square Jailbird PutterOdyssey Ai ONE Square 2 Square Jailbird Putter Odysseys Ai ONE Square 2 Square Jailbird Putter offers the famous Jailbird mallet putter head with exceptional MOI. Pair that with its modern center shafted design, it stays more square to your stroke path. The putter features the Ai ONE insert with an aluminum backer, White Hot urethane striking surface, and the new SL 90 Stroke Lab steel shaft. Center Shafted Engineering: Odysseys Ai ONE Square 2 Square