The power behind the LTDx irons begins at the core. A steel core bar centers the CG behind the hitting zone to deliver maximum power to the ball, and is suspended in a soft polymer to maintain exceptional feel. TECHNOLOGY: More Flexible For More Speed - The PWR-COR system creates Cobra ™s most flexible iron design for increased speed. The construction features a steel core bar that positions the CG behind the hitting zone to transfer more power to the ball. The core bar is fully suspended in a soft polymer to allow the face and sole to flex freely while maintaining exceptional feel. Longer Distance. Higher Launch - Cobra ™s largest PWRSHELL Face increases the zone of maximum ball speed. The new face cup design features a 23% larger thin area to increase speed away from center, and wraps further onto the sole to promote a higher ball flight. CNC Milled Face and Grooves - CNC milling produces more accurate groove shapes to optimize spin and control for improved accuracy and stopping power into the green.