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While the Taylormade Tour Preferred MC Irons is made from steel, 12 grams of titanium are forged into a pocket behind the face of each club. (It's the slightly darker material in the photo above.) Mizuno says the titanium allows the clubs to maintain the ideal amount of thickness behind the impact area for solid feel while automatically redistributing the weight to the heel, toe and sole of the club.

In fact, the heads of the Tour Preferred MC Irons are slightly smaller than last season's MP-58, the first irons released with this feature that Mizuno calls Ti Muscle. Yet Mizuno claims the clubs have a sweet spot that is 5 percent larger.

Distance gains are achieved through a unique combination of CNC milling and "under cut forging" that thin the face for improved energy transfer - resulting in the highest COR ever developed in a Callaway RAZR TOUR X Irons Set. As for the shaft, the NS PRO950 steel shafts, Project X(5.0 5.5 6.0 6.5) steel shafts and Dynamic Gold 300 steel shafts are available.

At the first sight, you will find the RAZR TOUR X are serious looking irons which are designed to offer amazingly forgiving and explosively long swing. The unbelievable distance of the irons is achieved by combining MAX COR Technology, Hot MetalTM Face construction, and an exotic pocket cavity to hit the maximum allowable limits for energy transfer.

Hot Metal construction of the best price RAZR TOUR X Irons utilizes a new manufacturing process that increases the material's natural strength to create an ultra-thin and multi-thickness face for maximum, consistent ball speed.