That's not to say that the Mizuno MP-58 Irons are a doddle to hit - after all, they're very much an MP club. The offset is minimal, and although the topline and face length measurements are slightly up on the MP-68, there's not much in it.
But what sets these apart is the technology that has gone into them. It's a half-cavity, in the vein of predecessors like the MP-30 or MP-60, but instead of steel, the cavity on the MP-58 is filled with a block of titanium. This is the first time that Mizuno has allowed an intruder like titanium into the blade's inner sanctum so it must be truly special to have earned its place on an MP club.
The key to this decision is weight. Titanium is 40% lighter than steel yet it retains the density required for a solid strike. This removal of mass allows weight to be spread across the clubhead, Mizuno MP-69 Irons widening the sweetspot, but without moving the CG (centre of gravity) too far away from the clubhead, thus ensuring a lower flight and plenty of workability.
At impact, the feel is incredibly solid, markedly different from the MP-68, which is much softer and more buttery. golf wholesale Despite what Mizuno says about a penetrating flight, I found the trajectory higher than the MP-68, but given that it is designed to offer a little bit of help, that is surely no bad thing - particularly if the towering iron shot is just your thing.
Like the MP-68s, the MP-58s were tuned for the optimum vibration frequency, which translates into feel. Mizuno JPX825 Driver Indeed, so much work has gone into the feel of this club that Mizuno says that playing-wise, it could have been released a year ago. But they wanted to get the feel element absolutely perfect and carried on working at it.
In terms of working the ball, it's still predictably good, although the increased forgiveness and technology does make it more of an effort than the MP-68. Again, that might not be a bad thing for some MP players.