The Callaway XR OS Iron set has Cup 360 face technology on the back cavity of the iron. The cup face wraps around the front of the club to increase ball speed and the weld lines to be behind the face rather than on it. A larger head allows for a bigger cavity behind the face and a thinner sole area on the bottom enables it to flex more at impact.
The next generation Forged Hyper Speed Face Cup is where the face wraps around the front of the club. It increases ball speed across the face for longer distance and forgiveness on off-center hits.
Built with a new construction and shape, the iron is the product of a dual heat treatment. Its price and meticulous craftsmanship mean it’s an iron made for speed out on the golf course. Use it if you’re improving your game or if you’re a slower swing player who needs more forgiveness.