CALLAWAY XR STEELHEAD IRONS - GRAPHITE - 4 TO SW
2017 series .
SHAFT- MATRIX F15 .
FLEX- LIGHT, REG, OR STIFF.
Callaway's next-generation 360 Face Cup technology is where the new Steelhead XR starts to differ significantly from its predecessor. Made from 17-4 stainless steel (face and body), the two-piece iron features a 360-degree annulus that's welded to the body and wraps around the perimeter.
It's the same technology currently found on the company's fairway woods and hybrids. The ultra-thin face produces a spring-like effect that protects ball speeds on off-center strikes. The boost in face-speed is so significant that it pushes the COR (coefficient of restitution) right up to the USGA legal limit.