JPX 919 Forged Performance Ball Speeds With a new back milled clubface, the JPX919 Forged is Mizuno's fastest ever forging in measured ball speed. Balanced with Mizuno's trademark workability and elevated Grain Flow Forged HD feedback - the JPX919 Forged is also Mizuno's most versatile iron. In the hands of a tour player searching for a distance equalizer, or an amateur wanting feedback to evolve their game - the streamlined JPX919 Forged delivers on every level. Back Milled Face CNC milled from