FEATURES:

3-PIECE CONSTRUCTION-The thin, high-strength titanium face, along with hollow portions of the heel, allow for an even larger high-density tungsten-nickel toe weight. The toe-side weight optimizes the Center of Gravity location for a higher, straighter launch.

MAINFRAME-A variable thickness pattern of grooves, channels, and cavities carefully milled into the backside of XXIO X Iron faces maximizes flex at impact for improved ball speed.

SPEED GROOVE-Three grooves on the back of the face allow it to flex more at impact for improved energy transfer and more ball speed.

V-SHAPED SOLE –Ideal for swings with a flat or steep attack angle, a higher bounce on the leading edge prevents digging while a lower bounce on the trailing edge allows for maximum workability.The dynamic V-Shaped Sole helps maintain clubhead speed through impact for clean strikes across fairway, rough, and sandeven if you contact the turf slightly behind the ball.

Specifications are available here