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GolfWRX Spotted: Costco Kirkland Signature irons on USGA Conforming List



Costco is continuing its expansion of the Kirkland Signature line into golf with new irons recently spotted on the USGA Conforming List.

Having previously produced balls, wedges and a putter, the new Kirkland Signature (Version 2) irons show that Costco is going all the way with golf equipment, with an offering that includes ‘Kirkland Signature’ and ‘Tungsten’ marked on the backside of the iron head, while ‘Forged’ is marked on the hosel.

Interestingly, the listing states that the irons are manufactured by Indi Golf, who have manufactured their own line of wedges (both conforming and non-conforming) as well as putters.

It appears as if the irons feature in part a hollow body construction and look to be less of a super game improvement iron than many would have anticipated.

In our forums, our members have been discussing the new Kirkland Signature irons and have been sharing their impressions, not least with the similarity in looks of the new additions to TaylorMade’s popular P790 irons.

Here are a few posts from the thread, but make sure to check out the entire discussion and have your say at the link below.

  • st1800e: “Interesting they went for a players distance iron and not a super or ultra game improvement iron.”
  • Klubster: “Logo aside, if they perform well, they will sell. But the logo will put off a lot of people just because of the vanity factor. I would rather see an exclusive brand like Dick’s did with the Tommy Armour 845s. I am sure they would not have sold as well if they had stamped Dick’s on the back.”
  • naj959: “I’m excited about these clubs. They would make the perfect set for my pops, who probably hasn’t swung a club in 10+ years but wants to grab some sticks with the latest tech. And he loves Costco! The members really do think highly of the K-Sig brand. I can see these in the bags of a large number of casual golfers. If they come in lefty, I know what someone’s getting on their birthday.”
  • FormerBigDaddy: “Not gonna lie, they look nice. I also agree that if they changed the logo/stamping on their golf equipment, they might do even better. Minimalist “KS” stamp or maybe “Kirkland” on the hosel like Taylormade does, and just the “Signature” cursive script would be kind of slick. I honestly think they could make some noise in golf equipment if they made a good product that didn’t scream Costco branding at a good price. We all know we overpay for what golf clubs actually cost to make. If they sold these at $399 with dynamic gold shafts, they’d probably sell a lot of them.”

Entire Thread: “GolfWRX Spotted: Costco Kirkland Signature irons on USGA Conforming List

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Gianni is the Managing Editor at GolfWRX. He can be contacted at [email protected].



  1. Pingback: Kirkland Clubs are on the way to retailers...including a brand-new driver - Fly Pin High

  2. Pingback: New Kirkland clubs appear to be on their way to retail…including an all-new driver – GolfWRX

  3. jgpl001

    Jan 9, 2023 at 7:03 am

    Why would anyone buy this stuff?
    Surely a good secondhand set of a leading OEM’s iron would be better quality and value?
    I cannot understand why people buy any golf equipment from second rate companies when there is such good value out there

  4. Pingback: Costco set to release new Kirkland Signature Irons in surprise reveal - SOCAL Golfer

  5. David

    Jan 4, 2023 at 11:28 pm

    Some lead tape will easily cover the stamping without hurting playability, though.

  6. Ben Hoagie

    Jan 4, 2023 at 11:21 am

    makes sense for them to offer a players distance style iron since they sell the Callaway Edge game improvement set.

  7. mo

    Jan 4, 2023 at 12:18 am

    Please don’t give us a 42* pw with this set

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Whats in the Bag

Richy Werenski WITB 2024 (May)



  • Richy Werenski what’s in the bag accurate as of the CJ Cup Houston Open.

Driver: Titleist TSR3 (10 degrees, D1 SureFit setting)
Shaft: Mitsubishi Diamana PD 60 TX

3-wood: Titleist TSR2 (15 degrees, A1 SureFit setting)
Shaft: Fujikura Ventus Red 8 X

Hybrid: Titleist TSR3 (19 degrees, D1 SureFit setting)
Shaft: Mitsubishi Tensei CK Pro White Hybrid 90 TX

Irons: Titleist T100 (4-9)
Shafts: Nippon N.S. Pro Modus3 Tour 105 S

Wedges: Titleist Vokey Design SM9 (46-10F, 50-12F), Titleist Vokey Design WedgeWorks Proto (54-M, 58-L @60)
Shafts: True Temper Dynamic Gold Tour Issue X100 Onyx (46-50), True Temper Dynamic Gold Tour Issue S400 Onyx (54-60)

Putter: Scotty Cameron prototype

Ball: Titleist Pro V1x Left Dash

Grips: Golf Pride ZGrip Cord

Check out more in-hand photos of Richy Werenski’s clubs in the forums.

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Adam Scott testing green “Masters Use Only” putter + 6 interesting equipment photos from the 2024 CJ Cup Byron Nelson



Welcome to the 2024 CJ Cup Byron Nelson event at TPC Craig Ranch in McKinney, Texas, which, for your geographical reference, is about 25 minutes from Dallas.

In early-week equipment news, we saw some interesting putter testing from Adam Scott, a Maxfli golf ball signing on the PGA Tour, a 16-year-old’s WITB, a PGA Tour player using another PGA Tour player’s backup putter, and Jordan Spieth weighed in on why he recently switched out just his 7-iron (and then made a hole-in-one with it).

With so much to report and so little time to waste on the intro, let’s get right into this week’s equipment rundown from the CJ Cup Byron Nelson.

See all of our photo galleries from the week here 

Adam Scott’s new L.A.B. putters

Before we get into a couple of the new prototypes Scott has been testing, above is a photo of the L.A.B. Golf Mezz.1 Max prototype putter that he’s been using, and will likely continue to use this week in Texas.

That being said, following the Masters, Scott was looking to try a couple putters with a slightly lighter weight to help with his feel on fast greens.

One of the new prototypes we spotted on Tuesday was a L.A.B. Golf DF3 “Proto 2.1”, custom-built with Scott’s preferred blue colorway, and an Australia-inspired Kangaroo laser engraving…

We also spotted him with a green-colored “For Masters Use Only” Mezz.1 Max prototype…

While it’s unlikely Scott will make a switch this week, it’s certainly something to keep an eye on going forward, especially on courses with faster greens.

We also got a peek into Scott’s full WITB this week, which consists of a super-mixed set of Srixon irons, including a ZX Utility 3-iron, a ZX-5 MkII 4-iron, ZX-7 MkII mid-irons (5-7) and Z Forged II short irons (8-9).

See Scott’s full WITB from the CJ Cup here

An update on Daniel Berger’s Odyssey Jailbird

Last week in New Orleans, we highlighted Daniel Berger’s Ai-One Jailbird Mini putter because of its unique sightlines.

Well, we have an update.

According to Callaway Tour Manager Joe Toulon, who spoke with this week, Berger’s Jailbird Mini is actually from fellow Tour player Tom Kim’s stash. Kim is a prolific putter tester, and the exact putter Berger is currently using was actually originally made for and tested by Kim. The putter didn’t make it into Kim’s starting lineup, however, so he gave the putter back to Odyssey, and it eventually made it’s way onto Berger’s gamer roster.

Jordan Spieth’s new 7-iron

As the story goes, Jordan Spieth changed out his Titleist T100 7-iron on Wednesday before the 2024 Valero Texas Open, and then on Thursday, he used the 7-iron to make a hole-in-one from 199 yards on the 16th hole.

Good timing on that switch, Jordan.

On Tuesday at the 2024 CJ Cup Byron Nelson, caught up with Spieth to get the full story on why he switched just the 7-iron.

Our full story is over on’s Equipment Report, but here’s a snippet of what Spieth had to say:

“I hit my 7-iron a lot, especially on my own. The spin rates, relative to my 6-iron and my 8-iron, were lower, so it was going too far. I was trying to figure out why, if it was something in the makeup of the iron. I got the lies and the lofts checked, and everything was fine. So finally I was like, ‘Can I just get a new one and see if it fixes it?’

“Maybe there was one other time throughout my career where I changed just one iron, so it’s very unusual. I think it’s just because the grooves were worn down from hitting it too much.”

Ben Griffin signs with Maxfli to play the golf ball

At the beginning of the year, LPGA Tour star Lexi Thompson signed a deal with Maxfli to play the company’s golf ball, and now, Griffin has officially joined team Maxfli, as well, thus expanding the company’s Tour presence. caught up with Griffin on Wednesday in Texas for a video interview about his new golf ball of choice, and how he marks it…


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A 16-year-old is playing on the PGA Tour this week, using a 2-iron!

Amateur golfer Kris Kim, at just 16 years of age, is making his PGA Tour debut this week after receiving a sponsors exemption into the event. In 2023, Kim won both the R&A Boys’ Amateur Championship and the European Boys’ International Championship.

On Tuesday in Texas, we got a look into Kim’s bag, which revealed that he’s currently playing a TaylorMade P-770 2-iron, and a bag full of TaylorMade clubs.

Check out Kim’s full WITB here

A smart golf ball stamping

I’m not going to sit here and pretend to be a big math guy, because I’m not. However, I do recognize David Nyfjall’s purple ball marking as a square root symbol.

While I don’t know the particular significance of the square root symbol for Nyfjall, I do know you have to be fairly intelligent to even consider using a marking like that. Pretty cool stuff from the Northwestern alum, and 2023 Byron Nelson Award winner.

And, with that, we say goodbye to Texas and TPC Craig Ranch. We’ll see you next week at the Wells Fargo Championship in Charlotte for more insider equipment news and storylines.

For now, don’t forget to check out all of our photos from the 2024 CJ Cup Byron Nelson

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Whats in the Bag

Wesley Bryan WITB 2024 (May)



  • Wesley Bryan what’s in the bag accurate as of the CJ Cup Byron Nelson.

Driver: Callaway Paradym Ai Smoke Triple Diamond Max (9 degrees @10)
Shaft: Mitsubishi Diamana GT 50 TX

3-wood: TaylorMade Stealth Plus (15 degrees)
Shaft: Mitsubishi Diamana GT 60 X

Hybrid: TaylorMade Stealth 2 Plus Rescue (19.5 degrees)
Shaft: Fujikura Ventus HB Blue 8 X

Irons: Titleist T200 (4), Takomo 101U (4), Takomo 101T (5), Takomo 301 CB (6-9)
Shafts: True Temper Dynamic Gold Tour Issue X100

Wedges: Titleist Vokey Design SM10 (46-10F, 52-08F, 56-14F), Titleist Vokey Design WedgeWorks Proto (58-A)
Shafts: True Temper Dynamic Gold Tour Issue S400

Putter: L.A.B. Golf DF3

Grips: SuperStroke, Golf Pride Tour Velvet

Ball: Titleist Pro V1x

More photos of Wesley Bryan’s WITB in the forums.

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