Odyssey Stroke Lab Putters incorporate a unique new method of weight distribution, led by the innovative new Stroke Lab shaft to improve the physical dynamics of the stroke. The tip-heavy graphite and steel shaft saves 40 grams* that’s relocated into each end of the putter to change performance dynamics. The Stroke Lab shaft is slightly stiffer and lower torque compared to standard putter shafts for to better control the slightly heavier head.