Product Overview: From grip to tip, the inexplicably ultralightweight XXIO 12 Irons are designed with one thing in mind—utilizing ultramodern flex technologies and exotic materials to promote significant ball speed improvement without the need to increase swing tempo. Ultimately, it means you can hit longer and more accurate Iron shots without having to change your mechanics. Experience the Difference. Features: Rebound Frame On the Irons, a thinner face allows the entire face to flex more extensively while grooves etched deep into the interior of the Iron body further enhance flex, especially for shots struck low. Titanium Iron Faces The High Strength Super-TIX®-51AF Titanium faceplate is just 2.1mm thick for increased flexibility and maximum ball speed. High-Density Tungsten-Nickel Weight Featured on 5-Iron through 7-Iron A high-density tungsten-nickel weight in the toe greatly increases Moment of Inertia for improved stability at impact. Weight Plus Technology Our proprietary design positions mass under your grip, behind your hands. This helps you find the ideal spot at the top of your swing and makes the downswing more consistent. Optimized Center of Gravity by Loft Progressive variable face thickness optimizes speed and launch for each Iron loft. Long Irons are designed for carry, with a lower Center of Gravity to provide enhanced ball speed right where you strike the face. Short Irons emphasize control, with a higher Center of Gravity for better high-low MOI. Loft Specific Grooves Control is key for short Irons. As lofts increase, the grooves are deeper and closer together, enhancing spin for more control and stopping power on approach shots.