PING I525 Iron Set - 4, PW Flex:Stiff Research into audio frequencies and

Research into audio frequencies and harmonics led engineers to create a new internal rib structure and increase the curvature (stiffness) of the crown

8 zippered pockets

Seamless Cup Face: Thinned areas revolving 360 degrees around the perimeter increase rebound area for maximum ball speed across the entire face

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Like Rugby

PING I525 Iron Set - 4, PW Flex:Stiff Research into audio frequencies andA powerful new design engineered with a forged, maraging steel face significantly increases speed and distance while providing a pleasing feel and sound. All packaged in a compact, players style model perimeter weighted to elevate forgiveness and deliver long, towering shots that hit and hold the green. Forged, Maraging Steel Face The strength of the variable thickness, maraging steel allows for a thinner, more dynamic face structure with an internal