Mizuno has really out did themselves with the newest Muscle Back iron collection. MP-20 MB model has taken something from all the old Mizuno blades and pooled it all together to make some of the best performing and slim looking confident Muscle back irons to date. The truth behind the MP-20 MB is the feel at impact is the newest aspect. Layering the face with a thin Nickel layer proves to weight the head correctly along with bring an amazing feel to the strike. The additional copper layer gives you the butterly feel especially when struck in the sweet spot. More for the in between player and player improvement iron set the MP-20 MB gives the up and coming golfer an amazing feel along with the abilities to form some shots and control the distances much more easily.Specifications