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Cl eveland CG4 Gold Iron Set

Cleveland Golf' s highly regarded CG10 wedges, as well as the company' s CG1 and CG2 irons, are made from a proprietary light-density metal that Cleveland calls CMM. That stands for Carbon Matrix Material. The metal contains carbon spheres suspended within the metal, creating a matrix that results in a metal 10-percent less dense and 15-percent softer than traditional carbon steel used in cast and forged clubheads, according to the company.