• Forged of mild blend 1020 carbon steel • Progressive center of gravity transitions form a low CG in the long irons to help get the ball up quickly to a high CG in the short irons for spin and distance control • “F.S.C.” design. Bridgestone acronym for Forgiving long irons, Stable mid irons, and Controllable short irons • Forgiving long irons – 2-5 irons are forged cavity back with dense, heavy tungsten inserts for enhanced perimeter weighting and lower CG • Stable mid irons – 6-7 irons are forged cavity back for forgiveness • Controllable short irons – 8-PW are forged trapezoid, muscle back blade style irons • Stock shaft is True Temper Dynamic Gold