Compact yet powerful, the Ai-DUAL Freebird DB Putter offers the perfect blend of alignment and forgiveness Odyssey's new line of Ai-DUAL putters feature their latest and greatest Ai-DUAL insert which delivers speed consistency across the face, incredible forward roll up and down the face, and amazing feel. Ai-DUAL Insert Designed using Artificial Intelligence, this dual-layer urethane insert has a soft outer layer and a firm inner layer delivering not only consistent ball speed across the face, but also enhanced forward roll up and down the face and amazing feel