Odyssey Tank 2-Ball Putter Counterbalance Stability Weighting: Uses a counterbalance weight, heavier head (400g) and heavier shaft (150g) to quiet the hands during the stroke Total Club MOI: 34" and 36" putters have a total club MOI that is 34% higher than a standard putter and a 19% increase in total club weight High Contrast Alignment: High contrast alignment highlights the proper face angle from address to impact for alignment throughout your putting stroke A new and improved version of the #1 insert on Tour is highly engineered for more consistent sound, feel and performance across the striking surface