The SPEEDZONE ONE Length Combo Set features hybrids and irons, each configured with matching 7-iron length (37.5”) and head weights to deliver improved consistency and accuracy. The SPEEDZONE irons feature a breakthrough in performance with our first ever Carbon Fiber Topline, delivering an ultra low CG for maximum speed and launch. The SPEEDZONE hybrid is equipped with new Hollow BAFFLER Split Rails, a forged stainless steel face, and a slightly oversize shape to deliver more ball speed, higher launch and more forgiveness. Speedzone Iron Features: SPEED STARTS AT THE TOP: Carbon fiber has a higher strength to weight ration than steel, and saves 3 grams to lower the CG and maximize ball speed. PWRSHELL BRINGS THE DISTANCE: A forged PWRSHELL face insert features a 35% larger Sweet Zone area, and a 8% deeper undercut to enhance ball speed and launch across the face. MORE STABILITY ON OFF-CENTER HITS: Extreme heel and toe weighting creates a lower CG and a higher MOI than most traditional iron shapes allow. EXCELLENT SOUND AND FEEL: A lightweight medallion features aluminum, TPU, and acrylic foam that work together to damp vibrations for excellent sound and feel. Speedzone Hybrid Features: HIGH-SPEED RAILS: Hollow rails flex more than solid rails, creating a 70% larger hot spot area from heel to toe for higher launch and more ball speed. FORGED FOR SPEED: A forged high-strength stainless steel face promotes more ball speed and higher launch across the face. BETTER TURF INTERACTION: Baffler Rails improve turf interaction by allowing the club to glide effortlessly through tight lies, thick rough, and even bunkers. LOW CG WEIGHTING: A fixed weight positioned low and back promotes a higher ball flight with more stopping power into the green.