Martin Hopley

When Cobra introduced the single length iron concept last year with the King F7 irons I reviewed the King Forged One Length irons and the re-introduction of this approach to golf really appealed to me.

The King Forged ONE Length irons remain in the line, but the King F7 ONE has been replaced by the King F8 ONE Length which features several key changes as the single length theory evolves.

Cobra King F8 ONE Length Irons

The blue grip and red and blue graphics on the back of the head distinguish it from the variable length model, but the concept of the three head styles is the same.

Cobra King F8 ONE Length Irons

As I covered in the Cobra King F8 irons review, the 4 to 7 irons use a hollow head with a faster PWRShell face to increase ball speeds and a lower CG to launch it higher with less spin and gain about 6 yards carry.

Cobra King F8 ONE Length Irons

The shorter 8-PW heads are cavity backs that have the same carbon medallion in the rear as the longer irons to improve the sound.

Cobra King F8 ONE Length Irons

The Gap, Sand and Lob wedge revert to a more blade style head with a small cavity filled with that carbon again and feature a sole that has heel, toe and trailing edge relief for more versatility.

Cobra King F8 ONE Length Irons

However it is not so much about the heads as the set up of the shafts with the King F8 One Length set and one of the key findings they have had over the first year of this approach is that the long irons went a little low and the short irons a little high.

Cobra King F8 ONE Length Irons

Therefore to counteract this, the F8 One long irons have a wider sole to lower the CG and increase the launch and also a more upright lie.

Cobra King F8 ONE Length Irons

Whilst the shaft length is still the same as before at 37.5 inches the lies vary through the set, with the 4 and 5 iron at 1° more upright than the standard 7-iron set up. At the other end of the scale, the PW is 0.5° flatter and the loftier version 1° flatter to change the flight.

Cobra King F8 ONE Length Irons

The longer irons were certainly easier to hit, but you will still need a mid to high swing speed to get the most of it. However to help here, Cobra has also introduced a King F8 ONE Length hybrid which you have to try so read the review here.

Cobra King F8 One Length Hybrid

This will give you the extra launch if you need it and has a range of lofts to replace the 4 and 5 ONE irons.

The blue golf pride grips are the same thicker diameter as before and now come with a built-in Arccos sensor for free, plus additional ones for the rest of your set.

Cobra King F8 ONE Length Irons

Pair these with the free Cobra Connect app on your smartphone and you will be able to track your performance and learn from your mistakes.

Cobra King F8 ONE Length Irons

Distance gapping is the thing I was asked about the most in the last year when I said I had tried the One Length irons and with the King F8 ONE set, I was getting a more consistent gap between the irons in the set than I was with the standard model.

Cobra King F8 ONE Length Irons

Whilst the head design might be changing, the shaft length and weight was not, so that was probably the difference and it also gave the ONE Length set a better flow as you went through it than the variable length F8.

Cobra King F8 ONE Length Irons

As with anything new, it can take a few goes to get it perfect and Cobra has listened and improved the playability of the King F8 ONE Length and I hope this works for them as I am a fan of this approach.

It is simple and easy to understand for those new to the game and like I said last time, it will be a slow burner so hopefully it will take light this time.

Cobra King F8 ONE Length Irons

Of the two King F8 iron sets I would go for the ONE Length as I think it felt a little better and with both of them being the same price, it is going to make that decision easier for you to make.

Golfalot Rating: 4 stars
More from Cobra



Cobra King F8 ONE Length Iron

Cobra King F8 ONE Length Irons - Product Details

UK Launch02 February 2018
UK Launch RRP£649
USA Launch12 January 2018
USA Launch RRP$799
European Launch02 February 2018
European Launch RRP€849
Handicap Range
Hand AvailabilityLeft, Right
Club Length37.5 inches
Swing WeightD0
Shaft NameTrue Temper XP 90, Aldila Rogue Pro 65
Shaft TypesSteel, Graphite
Shaft FlexLight, Regular, Stiff
GripLamkin REL 360 Connect
DesignCavity Back
Set Makeup5, 6, 7, 8, 9, PW, GW
Additional Clubs4, SW, LW
Manufacturer's WebsiteCobra Website

User Reviews

October 2018

Very nice clubs, I strike the ball in center every time, same swing through every club, but cannot get the 4 iron to go any more distance than 2 meter longer than the 5 iron. I swing at 85 Mph give or take 2Mph, Can anyone with the same swing speed tell me there distances, 4 - PW Having say all that I do like the clubs so easy to hit good shots.

GOLFALOT: The narrow distance gap at the top could be because you need more launch for your swing speed, which is something Cobra know about. That's why the One Length Hybrid is there to help get more launch than the One Length 4-iron. There is a review on this product on Golfalot too, so check it out.

September 2018

Well, very interesting. But for a single plane swing like Dechambeau you need a more upright club. They are not on the market and it is not possible to bend this clubs that much. Bryson Dechambeau plays 72 degrees lie. Also the Sterling irons, you only can bend them 4 degrees.

August 2018

Can you buy them with a lie of 72 degrees like Bryson DeChambeau plays?

GOLFALOT: The stock lie is 62.5° so they would have to be adjusted through Cobra custom fitting or by a third party. As an aside DeChambeau has a single plane swing, which is also unusual so his lie may not suit your swing.

August 2018

Excellent clubs. Have used the one length F8's since their launch. Excellent distance and control. Nice even gapping through the range.I have ordered the 4 and 5 irons as so easy to hit. Highly recommend.

April 2018

Played with F7 one length irons 18 holes for first time. Solid clubs very pleasantly surprised. Ball jumps off face. A winner - would recommend to friends.

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