Like the R500 Series drivers, the new fairway woods from TaylorMade use the same construction techniques to increase the size of the clubheads. The new clubs have a COR of .810 and a 30 percent greater moment of inertia (MOI) than the 300 Series fairway woods, producing increased forgiveness on miss-hits. A sleek sole design that glides through a variety of lie conditions, and that works with the high MOI to make the R580 fairway woods extremely easy to hit.