CENTER OF GRAVITY DESIGN FOR EACH CLUB NUMBER BY 3D CAD While utilizing the center of gravity design of the previous C03, which reached near limits as an iron made with a single material, center of gravity design for each club number was adopted to pursue optimal functionality excepted for each and balance as a set.

PRECISION INTEGRATED SOFT IRON FORGINGAND CNC UNDERCUTTING (#4-#7) Integrated soft iron forging provides a pure and crip feel when hitting. The ultra-precise soft iron forging and CNC machining which are distinctly different from traditional forging methods eliminate product deviations and deliver significant advantage in shape uniformity.

3D HEAD SHAPE THAT MATERIALIZES PROTOCONCEPT'S DEDICATION TO SHAPE The center of gravity position of the clubhead and sole shape have been optimized for all club numbers, assuming both good lies as well as difficult conditions and use on all types of courses, including when teeing up. The design offers even greater advantages to intermediate and advanced golfers who can make use of this while feeling the center of gravity.