Mizuno MP-20 HMB Irons Review

50 Words or Less

The Mizuno MP-20 HMB irons look good in the bag but are clearly game improvement at address.  Good feel.  Decent forgiveness.


From fall of 2018 to now, Mizuno has released a total of seven iron models.  The MP-20 HMB borrows its name – Hot Metal Blade – from the JPX family and is the most forgiving of the 2019 models.  Does this iron clearly differentiate itself from the other Mizuno releases?  I tested a set to find out.


The MP-20 HMB irons tell two very different stories in the bag and at address.  In the bag, this hollow body iron looks like a blade.  The branding is minimal, giving it a very clean appearance.

When you set this iron in a playing position, it’s clear that, despite the name, this is not a blade.  There isn’t much offset, but the top line is substantially thicker than either of the other MP-20 models.

Sound & Feel

The metal used in the MP-20 Hot Metal blade is billed as being “stronger” than that in the MP-20, so the feel is predictably firmer.  Impact produces a sensation that feels more fast than soft which is matched by the sound – a moderately loud “snap.”

Despite the more forgiving design, feedback from the MP-20 HMB is quite clear.  Mishits feel even firmer, and it’s easy to tell where the ball struck the face.


In testing all of the Mizuno MP-20 irons head-to-head, the Hot Metal Blade clearly fills its role as the most forgiving.  Thanks to tungsten weights in the heel and toe, you can miss the center of the face by a small amount and still hit the green.  Substantial mishits, however, can still cost you a club or two of carry distance.

Though the difference wasn’t that large for me, the HMB is the longest of the MP-20 irons.  Thanks to stronger lofts and a harder metal, the peak ball speed was slightly higher with the Hot Metal Blade than the MMC or standard MP-20.  The HMB was also the lowest spinning of the three, though the difference was quite small.

For those looking to use the MP-20 HMB in a combo set, make sure you keep an eye on the lofts.  These irons match the MP-20 MMC with their slightly strong lofts, but do not line up with the MP-20 blades.  If you want to make the jump from Hot Metal Blade to real blade, make sure you adjust the lofts to create even distance gaps.


The Mizuno MP-20 HMB is a fine iron.  It looks slick in the bag and offers enough forgiveness for players with handicaps in the low teens.

The question I’m left with is, “Who is this iron for?”  With the JPX919 Forged (review HERE) in the lineup, the Hot Metal Blade seems redundant.

Mizuno MP-20 HMB Irons Specs & Price

The following two tabs change content below.

Matt Saternus

Founder, Editor In Chief at PluggedInGolf.com
Matt is the Founder and Editor in Chief of Plugged In Golf. He's worked in nearly every job in the golf industry from club fitting to instruction to writing and speaking. Matt lives in the northwest suburbs of Chicago with his wife and two daughters.

Latest posts by Matt Saternus (see all)


  1. Is it more like the p 790 not really a blade but has some help with it ?

  2. How do these compare to the i500?

  3. How does these compare to Miura IC601 in terms of looks, feel, forgiveness and performance?

  4. Thanks for the review Matt. I know the lofts of the Hot Metal Pro are slightly stronger, but in your opinion how do these two compare to each other? I’m looking for a players distance iron but still want something that has good peak height.

    • Matt Saternus


      For my money, the Hot Metal Pro is a better club because it has a clear purpose. The HMB just feels like a tweener to me – not really great looking, not really forgiving, not the longest.



  5. Thanks, as always, for your review, Matt. Hmm. For such a hyped product launch — and let’s face it, this launch has been hyped, I was disappointed to see your “meh” review. It won’t stop me from testing these out on the range, but I’ll go in with even keel expectations, especially since Mizuno seems to be backstepping just a bit on their “no up-charge policy” on shafts. Again, thanks.

  6. I dislike this “new” category of faux blades, and blame pxg for triggering the trend… Triumph of marketing over function… I’m glad you finally provided a clear headed review of this club.

    • Actually, it could be argued that the trend PXG triggered…..was the intro of expensive, high-end, “look what I’ve got” clubs and the debate over their relative worthiness.

  7. In your main review you say the MP20 HMB ‘looks slick in the bag’, then you contradict yourself in a response saying it’s ‘not really great looking’. I have owned the MPH-5 and MP-5, and the MP20 HMB looks and performs better than the MPH-5, and is every bit as good as the MP-5. I’ll be putting these in my bag, and the fitter I’m dealing with has indicated there’s no up-charge for a premium shaft.

    • Matt Saternus


      To clarify, my comment about “not really great looking” referred to the way they look at address. In the bag, they do look slick. But with any of this, it’s subjective.



  8. Matt,

    Thank you for the review.
    I currently play the 919 forged which doesn’t have a 3 iron in the line up so I emailed Mizuno support to suggest a 3i to blend into the set 2 weeks ago. Mizuno suggested the new MP 20 HMB as the club for this yet it’s so new I’m sceptical as i have yet to see and feel this club in person.

    As someone who has played both would you believe these to be the best blend or would you suggest another perhaps older model?

    Thank you

    • Matt Saternus


      I think the MP-20 HMB is certainly one good option for a 3I. Depending on what you’re looking for (more forgiveness, launch, speed), you might also look at the JPX919 Hot Metal Tour.




    Hi I have a dilemma at the moment regarding shafts and a new set of irons .
    I am a 14 handicap player with a driver swing speed on average of 88mph. I have a challenge get a higher ball flight with irons and been advised to look at lighter shafts .

    I’m looking to buy either a new set of Taylormade P790 irons or Mizunomp20 HMB’s. The 790 is renowned for lower spin and ball flight due to the lofts . I have been recommended to go for the KBS Tour 90 shaft (in stiff) in the 790’s but feel this shaft might hit the Mizuno MP20 HMB’s a bit too high and was encouraged to look KBS C Taper Lite 105’s in regular as an alternative.

    Your feedback and help would be greatly appreciated. Thanks Campbell

    • Matt Saternus


      Why have you narrowed it down to these two? More importantly, have you been fit? The only way to know definitively which head, shaft, and combination will work best is to work with a fitter.




    Would you choose the Mizuno MP20 HMB’s over the Taylormade P790’s based on my earlier post ? Thanks Campbell

    • Matt Saternus


      Neither of these would be near the top of my rankings, but between them I would opt for the Mizuno. The P790 would never hold a green for me.



    What ones would be in your ranking for my handicap level if not these two ?

    Tried both novels at my local pro . Needed the KBs 90 to get the P790’s in the air . HMB’s were going to high with the kbs 90 hence the c taper lite 105 in reg

    • Matt Saternus


      The Cobra King Forged Tec is a great iron – distance without the silly low spin. PXG’s pricing is way down at the moment, so the 0211 or GEN3 are great choices. Callaway’s Apex is strong as is the MAVRIK Pro.




    Also considered the new cobra king Forged Tec Irons

Leave a Comment

Your email address will not be published. Required fields are marked *