? Vokey SM9 has a progressive centre of gravity (CG) in all lofts, optimizing flight, accuracy and tolerance of the ball. ? Using conical upper lines and varying lengths of hoses, the Vokey I & D team has raised the height of the CG in the highest lofts, promoting a lower and more controlled flight. ? The centre of gravity is also ahead of the face, resulting in a higher MOI, an exceptional feel and a stick face that simply wants to square on impact. ? The SM9 patented Spin Milled grooves are meticulously designed through a new cutting process to maximise effect and durability. ? Micro slots are individually cut between the grooves, maximising the effect on partial blows. ? Patented heat treatment is applied to the impact area that doubles the durability of the groove without affecting the feel, making it the most durable groove in the golf