MainFrame MainFrame is a variable thickness pattern of grooves, channels, and cavities carefully milled into the backside of the Iron face that maximizes flex at impact. This second-generation design goes even further, not just boosting COR but repositioning mass away from the face and into the toe and sole for a lower CG. Utility Iron Shapes Our widest soles, combined with minimal offset and an appealing look at address, makes our forgiving, hollow ZX Mk II Utility long Irons professional favorites. New for Mk II, every ZX Iron model now features the same topline thickness, so combination sets are even more seamless from address. Forged Multi-Piece Construction ZX Mk II Utility's forged SUP10 faces are strong yet light-increasing face-flex at impact for enhanced speed and distance-while a forged 1020 Carbon Steel body absorbs vibrations for a softer feel. Sole Notches Revered by Srixon tour staff, our popular sole notches on the heel and toe of each sole lessen drag by reducing the amount of surface area that contacts the ground. Ultimately, they provide better clubhead speed through turf and improve shot versatility without sacrificing forgiveness. Club Specs Club Lofto Lieo Length Offset Hand #2 18.0o 60.0o 40.00" 3.5mm RH/LH #3 20.0o 60.0o 39.50" 3.5mm RH/LH #4 23.0o 60.5o 39.00" 3.5mm RH/LH Shaft And Grip Details Nippon N.S Pro 950 GH Neo Steel: The N.S Pro 950GH Neo was developed with the popularity of larger iron head designs with strong lofts and lower center of gravities in mind. While inheriting the superb handling and directional accuracy of the 960GH, neo better matches today's iron heads with rigid characteristics refined by patented processes from our tour winning N.S Pro Modus 3 Multi Heat Treatment technology (MHT) and Multi Shape Adjustment technology (MSA). The same light feeling as before is better matched to new high-performance irons. A higher rigidity in the middle provides a sense of acceleration that secures spin and headspeed. UST Mamya Recoil 95 Graphite: You don't settle for steel in your woods, so why would you compromise with your irons? Get better feel, better consistency, and better accuracy with Recoil - the first revolutionary carbon fiber iron shaft that doesn't change the game; it makes steel obsolete. Recoil Technology provides more efficient energy transfer than steel (67%). Optimal spring effect in the walls of the shafts offers more efficient energy transfer to the ball increasing velocity and greater distance, while also providing more consistency, distance, and trajectory control. Golf Pride Tour Velvet 360: The Tour Velvet 360 features the popular look and feel of the Tour Velvet non-slip surface pattern in a 360-degree design. This grip features double-dash rings on both ends that allow for a consistent appearance regardless of shaft orientation or adjustments.