FEATURES Exceptional Launch and Control from Precision Tungsten Weighting - Precision tungsten is used in two ways to improve launch and control. Up to 11g of external tungsten is positioned to promote outstanding forgiveness. And up to 43g of internal tungsten is positioned to create high-launching long irons and easy-to-control short irons. Fast Ball Speeds from an A.I. Designed Face Cup - A high-strength face cup uses A.I. to optimize speed and spin across the face. Each head throughout the set features a unique A.I. pattern to enhance performance. Incredible Forgiveness from a Confidence-Inspiring Bertha Shape - Callaway's classic Big Bertha shape has been refined to inspire confidence at address. Each iron is designed with thicker toplines, wider soles, enhanced offset, and longer blade lengths to create forgiveness and a straight ball flight. Easy to Swing with Outstanding Feel - Big Bertha irons utilize lightweight components to provide an easy-to-swing package. Our patented Urethane Microspheres produce outstanding feel while maintaining exceptional ball speeds. Premium Look from a Black Smoke Finish - The all-new Big Bertha irons now come in a stunning Black Smoke finish. This ultra-durable finish creates a premium look in the bag.