Dumina Co., Ltd. was founded in 2013 with a single belief: that a shaft should not force a trade-off between weight and stability. That belief became KHT — Korea Hidden Technology — and the foundation of every shaft we build.
When the Autoflex SF Series first reached fitting rooms outside Korea, players described it the same way: "I've never felt anything like this." It was dismissed, reviewed, doubted, tested — and eventually embraced by tour players, master fitters, and industry press as a genuinely new category of driver shaft.
We've never filed a patent on KHT. We've never licensed the technology. And we've never outsourced our manufacturing. Every Dumina shaft comes from our facility in South Korea, where our engineers hand-tune every model the way a luthier tunes a guitar.
The original KHT shaft. Full-length construction. Five flexes. Sold worldwide through authorized dealers.
The Autopower line — Flex and Snipe — brings KHT to players who want a more traditional profile.
Our retail partner for the United States market. Direct-to-consumer sales of the full Autoflex and Autopower lineup.
Every prepreg layer, every tip section, every finish coat happens in our facility. No outsourcing, no OEM imitation.
The shaft you receive is the shaft we tested. We discard more than most factories produce.
A Dumina shaft is an investment — we sell through fitters who can match it to your swing.
The shaft has to work on the launch monitor first. Every other claim follows from that.