Callaway Odyssey Square 2 Square Ai-Dual Max Putter

Every other Square 2 Square model in the range is stored as face balanced. The Max is the one Odyssey files as genuinely zero torque, and that's a stronger claim, because balance describes how a head sits at rest where torque describes what it does while the club is moving. A centre shaft and a high-MOI head get it there. Three lengths, black, both hands.

Zero-torque putters have gone from a curiosity to a category in a couple of seasons and most of the majors now sell one, so this isn't a fringe idea any more. What they offer a golfer is a face that arrives square without any conscious effort to square it, which removes one of the two jobs in putting and leaves only pace. The look is the real obstacle. These heads tend to be large.