Dumina builds the shafts that changed the conversation. Powered by our proprietary KHT — Korea Hidden Technology — Autoflex and Autopower deliver more carry, tighter dispersion, and a feel that no conventional shaft can match.
Whether you want a full transition into the Autoflex feel or a familiar profile with KHT performance, we engineer a shaft for every swing.
The shaft that changed the game. Up to 30g lighter, KHT-engineered for higher launch and lower spin — without working harder.
The perfect transition. The flexibility of Autoflex paired with the substantiality of a traditional profile — strategic KHT placement, familiar feel.
Enhanced flexibility. Comfortable impact. Engineered for players who want stability and feel with the precision of Korean construction.
Conventional shafts force a compromise between weight and stability. KHT is the proprietary internal construction that lets us build shafts 20–30 grams lighter while keeping kick precision exactly where it belongs — at impact.
AutoFlex is offered as a premium exotic shaft option directly through two of golf's most iconic OEM brands — available when ordering a custom club from either manufacturer.
AutoFlex is listed in Callaway's premium shaft matrix across their full driver lineup — all five flex options (SF305X through SF505XX) available at custom order.
Custom Order AvailableAutoFlex has been part of Titleist's premium fitting matrix since 2021 — available through their Titleist Custom fitting program for drivers and fairway woods.
Custom Order AvailableAsk your local fitter or club builder to spec AutoFlex through Callaway or Titleist's custom ordering system.
Autoflex is one of the most counterfeited shafts in golf. Fakes look convincing but use inferior carbon, miss our KHT internal construction, and don't deliver the performance we engineer — and they're not covered by our warranty. Here's how to make sure you're getting the real thing.
Order through your local Dumina dealer, the official US shop at autoflex.us, or the Callaway and Titleist custom-order programs. Shafts sold heavily discounted on auction sites or by unverified retailers are almost always counterfeit.
Find a Dealer →Watch out for prices well below MSRP, sellers with no return or warranty policy, no proof of authorized dealer status, or shafts shipped without original Dumina packaging. If a deal seems too good to be true, it almost always is.
Read the FAQ →Already bought a shaft and want to confirm it's genuine? Send us a clear photo of your shaft and where you purchased it. Our team will help you verify it against our authorized supply chain.
Verify a Shaft →If you've encountered a seller offering counterfeit Dumina shafts, please let us know. Protecting our customers is part of what we do.
Every Dumina shaft is precision-built at our facility in South Korea. We don't license, we don't outsource — every layer of carbon, every taper, every weight balance is decided in-house by the team that pioneered KHT.
Proprietary high-modulus prepreg, sourced and rolled in Korea.
±2 CPM flex consistency. Every shaft frequency-matched.
Multiple-win shaft
Tour staff favorite
Driver of the Year
Distance leaders
The flagship SF505X earned top marks from major reviewers for its launch and dispersion across high-swing-speed players.
An engineer's-eye view of the KHT internal core and what makes it different from conventional graphite construction.
Across three continents in three months, KHT-equipped players keep showing up on top of the leaderboard.
Get fitted at an authorized dealer or shop directly through our regional partners.