The M-15, successor to the Pro 245, features distinct forged constructions within the set, each tailored for a specific purpose, all while retaining Mizuno's signature feel and player-preferred shaping. The long and mid irons are highlighted by Mizuno's advanced Contour Ellipse Face technology. Crafted from powerful Chromoly 4135+, whose strength properties allow the face to be thinner and faster than traditional steel, this multi-thickness forged construction pairs with a hollow body design to increase and optimize ball speed across the face. Not only are the long and mid irons faster and more forgiving, but they also boast a higher launch and improved stability, thanks to approximately 50g of tungsten strategically positioned low in the head. The short irons, where accuracy is paramount, feature a partially hollow 1025E steel Grain Flow Forged HD construction that�prioritizes control, precision, and workability. Mizuno Pro M-15 Irons Feature: Compact player's distance iron (slightly larger than the M-13) Long and mid irons are designed for increased speed, forgiveness, and launch, while the short irons are designed for accuracy and control Refined sole geometry with added bounce encourages cleaner entry and smoother exit through the turf, maintaining consistency across all course conditions Harmonic Impact Technology (HIT) and copper underlay produce the soft yet solid strike Mizuno is renowned for 4 to 7-Iron: Grain Flow Forged HD 4135+ Chromoly face and neck. Stainless steel back. Hollow-body design with tungsten weighting. 8-Iron: Grain Flow Forged HD 4135+ Chromoly face and neck. Stainless Steel back. Hollow-body design. 9, PW & GW: Grain Flow Forged HD 1025E Steel Body. 17-4 Stainless Steel back. Partial hollow-body design. Stock Steel Shafts: True Temper AMT Silver, True Temper AMT Black Stock Graphite Shaft: Mitsubishi MMT Stock Grip: Golf Pride MCC Teams Black Authorized Mizuno Retailer Specifications Club Loft Lie Angle Length Bounce 4 20� 60.5� 38.75"