The JPX921 Forged iron integrates the power of Chromoly into a full-body Forged iron for the very first time.
Initially applied in Mizuno's Hot Metal irons - Chromoly has made the cross over to a Mizuno's forgings with staggering results. The fastest ball speeds Mizuno has ever produced from a fully Forged iron - a treat for both the senses and the scorecard. Grain Flow Forged in Hiroshima Japan.
| Club # | Loft ° | Lie Angle | Offset (inch) | Length (inch) |
| 4 | 21 | 60 | 0.15 | 38.5 |
| 5 | 24 | 60.5 | 0.142 | 38 |
| 6 | 27 | 61 | 0.134 | 37.5 |
| 7 | 31 | 61.5 | 0.126 | 37 |
| 8 | 35 | 62 | 0.118 | 36.5 |
| 9 | 40 | 62.5 | 0.11 | 36 |
| PW | 45 | 63 | 0.102 | 35.5 |
| GW | 50 | 63 | 0.091 | 35.25 |