The Ai-ONE Milled Eight T S is a rounded progressive mallet with a slant neck, providing moderate toe hang that’s best suited for strokes with moderate arc and face rotation. This putter is milled out of stainless steel and fitted with our milled titanium Ai-ONE insert and features our new SL 90 Stroke Lab steel shaft.

All golfers, even the best players in the world, miss the center of face from time to time. And when you lose speed relative to a center hit, the ball doesn’t roll as far as you intended, so you miss more putts or leave them farther from the hole. Now with Ai-ONE Milled, we’ve leveraged Callaway’s industry-leading Artificial Intelligence design and super-computing capabilities to create the most advanced insert in golf, with consistent ball speeds across the face.