Key Features of the Callaway Epic Forged Star Irons: Stunning forged design with a multi-material Infinite Black finish and precise shaping promotes incredible sound and feel Suspended Tungsten Core technology promotes a controlled launch and consistent distance through a new, polyurethane cartridge wrapped with Urethane Microspheres Forged 1025 carbon steel body is equipped with a high-COR, ultra-thin face and 360 Face Cup Technology to deliver fast ball speed for long distance on center hits and off-center hits Powerful lofts combined with locations of CG allows for high and distance-enhancing launch conditions New VFT pattern provides ultimate spin and control by promoting optimum and consistent ball speeds and spin-rates Experience remarkable success through distance-enhancement while playing the Callaway Epic Forged Star Irons. The ultra-premium lightweight irons are designed to help golfers of all types maintain maximum ball distance. A forged 1025 carbon steel body, equipped with a high-COR, ultra-thin face is combined with 360 Face Cup Technology to deliver maximum ball speed for longer distance on hits. Distance-enhancing launch is achieved from powerful loft options and optimal CG placement. The new VFT pattern allows for ultimate spin and control by promoting consistent ball speeds and spin-rates. Design Details: Ultra-premium lightweight irons that helps golfers of all types maintain maximum ball distance Distance-enhancing technologies, premium components and a beautiful appearance allows for longer shots from tee to green UST shaft offers ultimate combination of ultra-lightweight and stability to promote distance through fast swing speed, high-launch and low spin Shaft: UST Mamiya ATTAS Speed Series 50g Graphite Shaft Grip: 43g Golf Pride J200 Grip