Stiff Flex. The XXIO 9 Series iron set features a revolutionary 5piece club head construction #47 and the newest improvement to Dual Speed Technology which promotes efficiency for the initial portion of the downswing. The XXIO 9 irons have a SUS630 cast body merged with a stronger ...Stiff Flex.
The XXIO 9 Series iron set features a revolutionary 5piece club head construction #47 and the newest improvement to Dual Speed Technology which promotes efficiency for the initial portion of the downswing. The XXIO 9 irons have a SUS630 cast body merged with a stronger lowdensity SuperTIX Plus rolled face and a nickel weight in the sole. In addition, engineers have placed highdensity tungsten weights in the toe and heel and the result is a head with the lowest CG in XXIO history and an extremely high heeltotoe MOI.
This 5piece structure enables the ball to get airborne with ease and further improves the carry distance on misshits. The XXIO 9 Series is designed to promote the perfect balance of club head speed and lag for increased energy and velocity at impact. This design improvement to the club creates a higher balance point moving the CG closer to the grip and brings the club head in tighter to the body of the golfer for a more efficient swing.