With our new RIBCOR technology, the M4 unlocks a new level of consistency and accuracy in a product designed to be the longest in our irons lineup. Combined with our thinnest face (1.5mm), our ultra-thin leading edge, and our thin-walled Speed Pocket, M4 iron produces golf shots that are not only long, but incredibly straight.

RIBCOR
RIBCOR localizes face flexibility in the hitting area, transferring more energy to the ball to increase distance and accuracy
RIBCOR stiffens the perimeter of the head creating a more rigid structure, enhancing sound and feel
RIBCOR mitigates toe flexibility for tighter dispersion

MORE FORGIVENESS
Optimized heel and toe weighting provides a significant increase in MOI vs. M2 '17, resulting in more forgiveness
Ultra-thin leading edge works in conjunction with the Speed Pocket to increase speed on low-face shots

MORE DISTANCE
Fluted Hosel and 360º undercut allows for redistribution of mass low in the head to increase launch distance, and consistency