Mizuno MP irons are the company's blade line for better players, forged from a single piece of steel and built to give a soft feel and precise control over shot shape. The letters stand for Mizuno ...

How irons went from hand-forged mashies and niblicks to numbered sets, cavity backs, the Ping Eye2 and hollow players distance irons like the P790.

Mizuno has forged irons in Hiroshima since 1968. Here's what Grain Flow Forging means for the JPX line.