A new heat treatment softens the forged faces on ZXi5, elevating feel while preserving the impressive ball speed of previous ZX Irons. High-density tungsten in each long and mid iron optimizes ball speed and spin, even on off-center hits, for consistent performance. MAINFRAME MainFrame’s variable-thickness grooves, channels, and cavities maximize flex for higher ball speeds. The expanded toe channel reduces weight and raises MOI, creating a lighter clubhead with a deeper center of gravity. This third-gen design boosts speed and adds balanced forgiveness. Tour V.T Sole Srixon’s Tour V.T. Sole redefines turf interaction with its unique blend of sole widths, bounce angles, and notches. This tech ensures a smooth glide through fairway, rough, and sand, maintaining speed even on shots that hit the turf slightly behind the ball. Progressive Grooves The 3i-7i irons have wide grooves for long shots in any condition, while the 8i-AW feature tighter, deeper grooves to boost spin on approach shots. Laser milling between grooves enhances friction across all lofts, ensuring consistent spin, distance, and launch throughout the set. Players Iron Shape Tour-level and low-handicap players favor a thin topline, narrow sole, compact blade, and minimal offset. These sleek players’ irons deliver maximum workability with a muscle-back cavity and a sharp, clean look at address. Each ZXi iron maintains the same topline thickness for a consistent look across models, allowing for seamless set blending. Specifications are available here