SAE8655 Chrome Molybdenum Steel Used for the Face with three-level thickness DeviationCrafted from durable SAE8655 chrome molybdenum steel, the face of the ProtoConcept C07 irons is designed with a unique three-level thickness deviation. This advanced face structure includes a thicker lower face (2.7mm) for enhanced ball retention and a thinner top blade for improved responsiveness. The upper part of the face is heat-treated with high-frequency, maintaining strength while allowing for easy ball launch. This thoughtful design ensures effortless ball flight and excellent straight-shot performance, even for players with slower swing speeds.Engineered with Optimal Weight Placement in Pursuit of ResultsThe C07 irons are engineered with a low and deep centre of gravity (CG), made possible by the bold pocket and face structure with thickness deviation. This design enhances forgiveness on off-centre strikes while promoting a straight ball flight. The soft S20C body offers a solid feel and high bounce, making it easier to address the ball and swing confidently. The result is an iron set that provides improved ball retention, consistency, and unmatched playability for golfers at any skill level.Specifications Club Loft Lie Bounce FP 5i 25 ° 61 ° 4 ° 3.3mm 6i 28 ° 61.5 ° 5 ° 3.5mm 7i 31 ° 62 ° 6 ° 3.7mm 8i 35 ° 62.5 ° 6.5 ° 3.9mm 9i 39 ° 63 ° 7.5 ° 4.2mm PW 44 ° 63.5 ° 8.5 ° 4.5mm
