Mizuno mp15 steel irons with the balance of tradition and technology the mizuno mp15 golf set helps you become a stronger ball striker it has a thicker ti muscle with more curvature for a one piece solid feel the scoring irons have a short blade length than forgiving long irons also the frame work from the 1025e steel billet for ultimate feel and precision golf set thicker ti muscle lighter 10g ti insert grain flow forged tour proven sole reverse length head flow rh 4