The Mizuno JPX 900 Tour Blade Irons are made from a 1025E Pure Select Mild Carbon Steel and feature Mizuno's patented Grain Flow Forging. These irons have a Power Frame Design that pushes weight to extreme corners of the clubs for added stability. A lower toe height provides a sleek look with a reinforced top line that ensures a strong sound at impact. The 900 Tour Blade Iron Set has a compact head size and tour proven sole geometry that is smaller than the MP 25 with more forgiveness. These iron ship out 9/16.