Callaway Tour Authentic X Muscle Prototype irons. Introducing the most anticipated Irons of 2008, the Callaway Golf Tour Authentic X Prototype Irons. These bladed irons are the most sleek Tour style iron Callaway Golf have ever produced and are sure to be a big hit. These irons first featured in the bag of Callaway Staff Professionals Ernie Els and Phil Mickleson late in 2007. After Micklesons success at the 2008 HSBC Champions and Els's victory at the 2008 Honda Classic with the X Prototype Irons Callaway decided to introduce these gems to the amateur game.
The Forged 1020 Carbon Steel Construction provides unmatched feel and performance, giving low handicap golfers incredibly soft, responsive feedback at impact. The White Chrome finish delivers the preferred aesthetics for Tour players, with a very thin topline, narrow sole and shorter blade length for maximum workability in various turf conditions. The flighted CG Design, provides optimal trajectories, ball flight, and distance control that Tour players demand with seamless performance progression through the entire set The unique X-Muscle Back design provides consistent trajectories and maximum playability in a blade design.