Ping i irons steel using 431 stainless steel for the first time in a ping iron engineers relied on the materialrsquos high strength to weight ratio and softer feel to create a head design that delivers workability and trajectory control with the right amount of forgiveness lengths and lofts are optimized to increase distance with proper gapping resulting in a clean players style iron with a high moi that offers wide appeal the i is custom engineered with 431 stainless steel for its high