XR is an iron built for speed. We’ve taken the Cup 360 that’s redefined ball speed in fairway woods and brought it to irons. The improved Cup 360 acts like a spring on shots hit low on the face and increases ball speeds everywhere else on the face too.REVOLUTIONARY BALL SPEED FROM CUP 360Our improved face cup technology acts like a spring on shots hit low on the face to increase ball speeds. The speed is higher at every other impact location on the face too.LOWER CG MORE MOI AND BALL SPEEDThe Internal Standing Wave is the ultimate team player. It’s refined the way that we lower CG increased MOI and gives the face cup the freedom to flex for more ball speed.NEW CONSTRUCTION AND SHAPEAn iron built for speed needs a different level of refinement and attention in this case a 2 piece construction that includes a dual heat treatment. It’s precise meticulous craftsmanship that XR deserves.Specifications Club Loft Hand Length Lie Swing 3 Iron 18° RH/LH 39.5" 59.75° D2 4 Iron 20.5° RH/LH 38.875" 60.5° D2 5 Iron 23° RH/LH 38.25" 61.25° D2 6 Iron 26° RH/LH 37.625" 62° D2 7 Iron 30° RH/LH 37" 62.5° D2 8 Iron 34.5° RH/LH 36.5" 63° D2 9 Iron 39° RH/LH 36" 63.5° D2 PW 44° RH/LH 35.75" 64° D2 AW 49° RH/LH 35.5" 64° D2 SW 54° RH/LH 35.25" 64° D2 LW 59° RH only 35" 64° D2 Shaft Specifications Shaft Flex Weight Torque Kickpoint True Temper 4.5 Light 55 high low True Temper 5.5 Regular 58 high low True Temper 6.0 Stiff 58 high low mid