Mizuno JPX-825 4-PW, GW Iron Set with Steel Shafts Mizuno JPX-825 Optimized MAX MOI Pocket cavity and extreme toe/heel weighting deliver Mizunos largest Sweet Area ever. Mizunos scientifically designed Harmonic Impact Technology ensures an extremely solid sound and feel at impact. Multi-material electroform badge to further enhance feel and deliver aggressive styling. Triple Cut sole design for ideal turf interaction from and lie on the course.