Mizuno JPX-825 Pro 4-PW, GW Iron Set with Steel Shafts The grain flow forged Mizuno JPX-825 Pro Iron Set pushes the design limits to achieve greater forgiveness and feel in this players game improvement iron. The 4-7 irons offer a deep CNC milled pocket cavity that provides 17 grams of discretionary weight that is used for extreme toe-heel weighting providing plenty of forgiveness where you need it. The 8-iron through the Gap Wedge feature a full cavity design with greater thickness behind impact for a more penetrating and workable ball flight for pinpoint accuracy in the scoring irons.