KING F8 ONE Length Irons

COBRA’s first ever connected set of ONE Length™ irons will improve your game. Carbon fiber tuned PWRshell™ Technology delivers superior feel and long, towering shots. COBRA Connect Technology proves the performance.

Stock Set: 5-GW (7 Clubs)


Availability: In stock

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  • What It Is

    The industry's first electronically enabled set of ONE Length™ irons. Every iron is designed to match 7-iron length and clubhead weighting.

  • Who It's For

    5 to 25 handicap golfers with moderate to higher swing speeds seeking a forgiving distance iron with enhanced feel.

  • Why we made it

    The KING® F8 ONE Length™ irons have been re-engineered using progressive clubhead constructions and flighted shaft technologies to deliver improved trajectory and feel through the set.

F8 Driver Grass Laydown
F8 Irons One Length
F8 Irons One Length


Progressive clubhead construction features progressive sole widths and hosel lengths for optimized trajectory and feel from the long irons to the wedges.


Graphite and steel shafts feature adjusted flex profiles through the set for higher launching long irons and short irons with lower, more controlled trajectories.


Each KING® F8 iron is configured to match 7-iron length, head weight and swing weight to promote consistent feel through the set.

One Step Further

Flighted Shaft Technology.

COBRA® has teamed up with its shaft partners to engineer unique designs that optimize ONE Length™ performance. Utilizing flighted shaft technologies, the graphite and steel shafts feature adjusted flex profiles that make the long irons play softer and launch higher, and the short irons play stiffer and launch lower.

Higher Launch Lower Launch

Long Irons Made Easy

Featuring a lower profile clubhead design with wider soles in the 4-6 irons, the CG is moved lower and deeper to deliver higher launching trajectories. Paired with an optimized E9™ Sweet Zone™, the KING® F8 ONE Length™ long irons are faster and longer, while maintaining the simplicity and accuracy that players find appealing with the ONE Length™ set makeup.

Long Irons

A Short Game You Can Brag About

The key to a better short game is knowing your wedge distances. The KING® F8 ONE Length™ wedges give you more confidence with one setup and one swing, while an improved clubhead construction promotes lower, more controlled trajectories. The result is more consistency, more predictable distances, and closer birdie opportunities.

Short Game

for Consistency

The KING® F8 ONE Length™ irons feature cutting-edge technologies that make them even easier to hit and more consistent than ever before.

Simplify Your Golf Game

Proper setup includes foot positioning, spine angle and ball position, and many other variables. These variables change as you switch between longer and shorter length clubs, causing more room for error. With one setup and one swing you can simplify the entire process. Every player has their favorite club and for many, it's a 7-iron. With COBRA's ONE Length irons, you will find new confidence in your game, allowing you to play any iron in the bag as if it were your trusty 7-iron.


One Swing For Every Shot

In a traditional iron set, certain variables of the swing change as you switch between your longer and shorter irons, causing more room for error. With one setup and one swing, you can simplify the entire process and swing every iron in the bag with confidence like it's your trusty 7-iron.

Better Distance Gapping

Studying real-world yardage gaps using Arccos data, many players have distance overlap with their variable-length long irons. ONE Length™ long irons provide more confidence at address, promoting more consistent ball striking and carry distances.

Tighter Shot Dispersion

Having a more comfortable, repeatable swing that is shared between your long irons and short irons promotes more consistent contact. The result is more greens-in-regulation, tighter approach shots and more birdie opportunities.

More Accurate Short Game

If there are weak points in your short game, you are not alone. The KING® F8 ONE Length™ wedges provide a seamless transition from your long and mid irons allowing you to set up to every shot with confidence and attack the pin with more consistency.


Golf's most advanced technology, COBRA CONNECT™, Powered By Arccos™ features electronically enabled grips in each iron. Detailed stats are recorded automatically, allowing golfers to access an in-depth analysis of their game using the COBRA CONNECT™/Arccos 360™ app on their Smartphone.

Cobra Connect
Get the Full Experience


Leverage the power of data to take your game to the next level. Arccos 360™ users improved their handicaps 36.4 times faster than the average golfer.


COBRA CONNECT™ analyzes every aspect of your game, while providing you with advanced GPS distances to any point on the course so you can make smarter shot decisions.


Know true distance averages for every club in your bag as well as your strengths and weaknesses so you can hit more greens and lower your scores.


Lightweight COBRA CONNECT™ sensors are seamlessly embedded in the end of each grip to ensure comfort during the swing, without affecting weighting or performance.


Golfers who purchase a set of KING® F8 irons will receive additional Arccos screw-in sensors to connect the rest of their clubs, and a free 1-year subscription to the Arccos 360 platform (a $250 value). The Arccos sensors work in conjunction with the COBRA CONNECT™ grips that come with the KING F8 irons, so users can track improvements for every club in their bag.

Woods and Wedges

Woods and Wedges

6 Sensors Included


1 Sensor Included


COBRA CONNECT™ works in conjunction with the Arccos 360™ mobile app - the award winning connected golf system that helps players of all skill levels make smarter, data-driven decisions.

RangeFinder GPS

GPS Distances

COBRA CONNECT™ provides advanced GPS distances on over 40,000 courses worldwide, so users can pinpoint exact distances (in yards or meters) to any point on the course.

Smart Distance

Smart Distance

Know true averages for every club in your bag so you hit more greens and make more birdies.

Tour Analytics

Tour Analytics

Know your strengths and weaknesses for every club so you can practice more efficiently and shoot lower scores.


Featuring COBRA's patented E9 TechnologyTM, an all-new forged PWRSHELLTM face construction delivers driver-like speed and distance.

Forged PWRShell


A multi-material carbon fiber construction damps vibrations at impact for exceptional sound and feel through the set.

Carbon Fiber Insert

Lower Profile Construction

A lower profile clubhead design lowers CG for higher launch and more clubhead speed.

Lower Profile Construction


Advanced construction technologies combine to create the ultimate progressive irons that deliver tailored performance through the set.

Full Hollow Iron

Full Hollow Iron

A hollow construction in the long irons lowers CG and delivers a highly responsive face for increased launch and speed. A carbon fiber medallion damps vibrations for improved sound and feel.

Cavity Back Iron

Cavity Back Iron

A cavity-back design in the mid to scoring irons delivers improved accuracy on approach shots. A two-piece carbon fiber insert and medallion work to deliver softer, yet more solid feel.

Specialty Wedge Design

Specialty Wedge Design

A specialty wedge design with a carbon fiber insert in the GW, SW and LW damps vibrations for improved feel and precision around the greens.

Optimized CG's

Variable hosel lengths strategically position the CG for optimum launch, speed and forgiveness through the set. Lower profile long irons with shorter hosels lower the CG for improved launch and forgiveness. Progressively taller hosels in the mid to scoring irons raise CG for improved control and accuracy on approach shots.

Dual Roll

Milled Grooves.
Spin Redefined.

CNC milling delivers more precise groove structures resulting in optimum spin and trajectory characteristics for the long irons, mid to scoring irons and wedges.

Milled V-Grooves

Milled V-Grooves

Milled V-Grooves reduce spin for maximum distance and flight time.

Milled U-Grooves

Milled U-Grooves

Milled U-Grooves optimize spin for improved control and more accurate approach shots.

Wedge Space Grooves


Tighter, wedge-spaced grooves deliver increased spin for more precise shots around the green.

Also Available In
Variable Length

The KING® F8 Variable Length Irons deliver superior feel and long, towering shots.

Learn More
One Length



  • Steel: 5-GW
  • Graphite: 5-GW

Model Loft Lie Offset
Swing Weight
Swing Weight
4 19.5° 63.5° 5.4 37.50" 37.50" D0 D1 RH/LH
5 22.5° 63.5° 4.7 37.50" 37.50" D0 D1 RH/LH
6 25.5° 63.0° 4.4 37.50" 37.50" D0 D1 RH/LH
7 29.5° 62.5° 4.0 37.50" 37.50" D0 D1 RH/LH
8 34.0° 62.5° 3.7 37.50" 37.50" D0 D1 RH/LH
9 39.0° 62.5° 3.4 37.50" 37.50" D0 D1 RH/LH
PW 44.0° 62.0° 2.9 37.50" 37.50" D0 D1 RH/LH
GW 49.0° 61.5° 1.0 37.50" 37.50" D0 D1 RH/LH
SW 54.0° 61.5° 1.0 37.50" 37.50" D0 D1 RH/LH
LW 58.0° 61.5° 1.0 37.50" 37.50" D0 D1 RH/LH
*Lengths based on COBRA CONNECT gripped length. Standard gripped length will be .25" shorter.


Aldila Rogue Pro ONE Length 65
ModelFlexShaft WeightKick PointTrajectorySpinTip Diameter
Aldila Rogue Pro ONE Length 65 Stiff 67g Mid Mid Mid 0.370
Aldila Rogue Pro ONE Length 65 Regular 65g Mid Mid Mid 0.370
Aldila Rogue Pro ONE Length 65 Lite / Senior 63g Mid Mid Mid 0.370

True Temper XP 90 (Flighted)
ModelFlexShaft WeightKick PointTrajectorySpinTip Diameter
True Temper XP 90 (Flighted) Stiff 110g Mid Mid Mid 0.370
True Temper XP 90 (Flighted) Regular 108g Mid Mid Mid 0.370


COBRA Lamkin REL 360 Connect - Blue/Red

COBRA Lamkin REL 360 (Tour Taper) Connect - Blue/Red

Customer Reviews

F8 one length Review by Bill b
Ordered these from Peter , very knowledgeable and personable. Got the set 5-lw (9) clubs. Sound,feel, ball flight absolutely awesome!!!! Love these clubs, could not be happier with this purchase.
(Posted on 2/17/2018)
F8 Review by Alby Longballboarder
This is the first set of one length (OL) irons I have bought from Cobra. I did toy with the PinHawks SL for a while at the range but never liked the sole or the quality of the hits, so I started looking at the F7 OL irons - they were very nice especially the Forged One irons.

I was going to order the F7 but then the F8 came out - this set is now in my bag. I have the 4 iron thru Pitching Wedge. My wedges 50*, 52* and 56* remain variable length.

PROS - One of the best aspect of OL is definitely the EASE & consistency of hitting shots with the irons, from PW thru to 4 - it's all 7 iron length. No more fat or thin shots. At the range, you're working on the one single swing plane, just bring one club.

One thing though, the F8 have variable lie angle. Now it is noticeable going from PW directly 4 iron (PW is flatter while 4 iron is steeper) but it didn't effect my swing.

Form what I can see, the variable lie is by design from Cobra's research and experience so I am not going to argue with them, it still works out fine for me. The 4 iron is sweet to hit and so is the Pitching wedge.

CONS - being a new golfer to the One Length world, I am still trying to wrap my head around how fast to swing.

Should I swing the 4 iron faster than the Pitching or same speed? Where is the right & optimal ball position - the 4 iron in the variable length is usually played forward but now it's more middle. These are the new "variables" that us individual golfers need to sort out by ourselves, there is no magic cure. Plus it makes it fun to experiment & see what works the best.

Also, it takes a while to get use to this especially after decades of variable length.

Seeing a 4 iron in a 7 iron length, you go "wow" until you hit the 4 iron so sweet and then you go "WOW".

Another CON, I let a junior try my F8 8 iron and he hit it on the toe with a range ball. Now, that toe area with the chrome is marked with the dimples from the range ball. I cleaned and cleaned it and I can still see the dimple marks under certain angles of light. I have never seen how a ball strike can leave a mark on a chrome surface. Kinda shocked me that the chrome is not tougher on these iron heads. I've owned my iron sets, never once complained about any chroming issues until now. This caused me to reduce an automatic 5 star rating to 4 star because of the weaker finish.

REWARD - you'll see more consistent ball striking, the miss is less because going "wild" on a variable length long iron is way worse than that same bad swing on a 7 iron.

Nice job on the F8 irons Cobra.

SIDENOTE the Forged Pwrshell is great. I love this technology. However, I thought the Pwrshell was from 4 iron to Pitching wedge. It's not, its only from 4 iron to the 7 iron. Just note that because it's not spelled out on this website. (Posted on 2/8/2018)
Great would be ideal for handicapped golfer Review by ADP
Being a player with a very bad back and amputee 1/2 right foot the same length clubs would be ideal. Being able to swing the same way each club would be consistent for me. (Posted on 1/18/2018)

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