A single-spec shaft engineered to deliver maximum power and efficiency for any golfer with clubhead speeds up to 90 mph. Ultralight at just 39 grams, the Flex One is built in Korea with KHT technology and tuned for smooth-tempo players who want effortless distance.
The autoFlex Flex One is a single-spec shaft — one flex option, designed to fit golfers with clubhead speeds up to 90 mph. At just 39 grams, it's ultralight and tuned for smooth, rhythmic tempos where KHT's load-and-release response is most effective.
Manufactured in Korea with ultralight materials and KHT construction, the Flex One delivers maximum power and efficiency without the guesswork of choosing a flex.
Single-spec design · Yellow · Driver / Wood
| Flex | Weight | Swing Weight | Club Speed | Build Length | Tip Size |
|---|---|---|---|---|---|
| Flex One Single Spec | 39 g | C5–C8 | Up to 90 mph | 45" | 0.335" |
Raw length 45". Recommended build length 45" for optimal swing weight control.
The Flex One is a single-spec shaft — no flex selection required. It's designed specifically for golfers who match this profile.
Driver clubhead speed
at or below 90 mph
KHT performs best with
smooth, unhurried tempo
Effortless distance
without added swing effort
Shop Flex One direct through autoflex.us or get fitted at an authorized Dumina dealer near you.