SM9’s patented Spin Milled grooves are meticulously engineered through a new cutting process to maximize spin and durability. The process starts by cutting the face perfectly flat with a high-speed saw. Then every groove is individually cut based on loft and finish; low lofts (46°-54°) are designed with narrower, deeper grooves, while higher lofts (56°-62°) have wider, shallower grooves.
Micro-grooves are individually cut in between grooves, which maximize spin on partial shots. A proprietary heat treatment is applied to the impact area which doubles the durability of the groove without impacting feel, making it the most durable groove in golf. The process is only complete when every Vokey wedge is 100% inspected for utmost quality and performance.