MacGregor M675 Iron Set Experience the true benefit of forged carbon steel: the sweet sensation of pure, perfect contact. Unlike most forged irons, the M675 long irons are easy to get up in the air, even with the modern, low-spin golf ball. The unique hosel-face hollow-body construction provides a flexible face for more ball speed, forgiveness and high launch properties. Progressive weighting and mixed metals combine to produce forgiving, high-launching long irons and shot-shaping control short irons - all within a single set. Variable Clubface Hardness High rebound face. Bigger sweet spot. More forgiveness. Induction heat treating the clubface rewards golfers for hitting it pure, without overly penalizing them for mis-hits. It s a science unto itself, whereby rapid temperature change realigns the grain structure of the metal. A coil connected to the face s center radiates heat outward, ensuring a measured transition to softness at the perimeter. The distinction is that MacGregor s heat-treating process is the metal itself. The uniform grain structure of forged carbon steel produces a uniform heat dispersion, and thus a more perfect trampoline. One that launches center shots faster and farther, while keeping off-center shots straighter, with less loss of distance. Progressive Weighting Localized CG. Optimal Launch. There s an important difference between a 3-iron and a 9-iron, but there s an equally important difference between a 3-iron and a 4-iron. To achieve perfect ball flight and maximum distance for each club, MacGregor has localized the CG in the ideal position for each loft. Precision tungsten weighting in the 3 and 4 irons creates a low, deep CG for better launch and forgiveness. The CG continues to progress higher and closer to the face through the set via the progressive muscle back for maximum playability and control in the short irons. Forged Carbon Steel Uniform metal grain. Shot consistency. Pure feel. For players who take their game seriously, there is no other choice but forged carbon steel. The dense and uniform grain structure of forged carbon steel makes it repeatable, which is why the M675 irons offer such a unique combination of shot consistency and feel. It s why a solid shot with a M675 3-iron will always travel the same distance. But the true benefit of forged is unquantifiable. The feel you get from the M675s, as the expression goes, runs directly to your heart. That sweet sensation of pure, perfect contact is what golfers take home with them after a round - and why they can t wait until the next one. Mixed Metals High rebound long irons. Soft short irons. Optimal distance and control. Because long irons and short irons perform different functions, the M675s use two kinds of carbon steel within the set. The 3-6 irons are forged from 1045, a medium-carbon steel with an ideal combination of strength and sensitivity used to optimize the hollow body structure for easy high launch and maximum distance. In the 7-PW, a softer