Callaway Apex Ai300 Irons Steel LHCallaway Apex Ai300 Irons Steel LH Premier Performance With Pure Feel The Callaway Apex Ai300 Irons are meticulously designed for pure feel, power, and consistency. These elegant cavity back designs feature a slightly larger profile that blends performance and forgiveness in our most complete game improvement iron, delivering performance that stands alone. A forged cavity back design combined with a forged 455 face creates a Tour level sound and feel.