Apex Pro features a premium construction for superior performance from A.I. designed Flash Face Cup and a forged hollow body. The unique Flash Face architecture is designed to create high ball speeds, increased spin robustness, and the distance and control you prefer. A forged 1025 hollow body construction and patented urethane microspheres deliver an incredible feel and sound at impact that golfers have come to expect from Apex Pro. The massive Tungsten Energy Core optimizes launch and forgiveness, with up to 90g of tungsten per iron. The new Apex Pro 21 irons continue the tradition of Tour distance and performance in a superior construction.