The same KHT engineering that transformed driver performance — now built for iron play. Improved accuracy, greater control, and elevated ball velocity with every strike.
Conventional iron shafts force a trade-off between weight and stability. KHT — Korea Hidden Technology — eliminates that compromise. Decreased mass with strategic internal construction delivers consistent force transmission and tighter dispersion shot after shot.
The result: higher ball velocity off the face, increased carry distance, and a level of shot-shaping control that heavier shafts simply cannot provide.
Both models share KHT construction and a 0.370" tip. Your swing speed determines the right choice.
Improved accuracy and greater control through decreased mass and KHT. Three flex options covering 75–105 mph. The entry point into autoFlex iron performance.
The Dream 7 iron brings the ultra-low-torque, high-energy-return profile of the flagship driver shaft to your irons. Built for players who want every last yard.
$210.00 per shaft · Tip: 0.370" · Length: 39" uncut · Swing Weight: D0–D2
| Flex | Weight | Swing Weight | Club Speed | Player Profile |
|---|---|---|---|---|
| SF305 Senior / Lady | 47 g | D0–D2 | 75–90 mph | Smooth tempo, lower swing speed |
| SF405 Regular | 50 g | D0–D2 | 85–100 mph | Mid-amateur, average tempo |
| SF505 Stiff | 53 g | D0–D2 | 95–105 mph | Strong amateur / low handicap |
$230.00 per shaft · Tip: 0.370" · Length: 39" uncut · Swing Weight: D0–D2
| Flex | Weight | Swing Weight | Club Speed | Player Profile |
|---|---|---|---|---|
| SF405 Regular | 47 g | D0–D2 | 85–100 mph | Mid-amateur, average tempo |
| SF505 Stiff | 52 g | D0–D2 | 95–105 mph | Strong amateur / low handicap |
| SF505X X-Stiff | 54 g | D0–D2 | 105–110 mph | Tour-level / aggressive swinger |
Use your iron club speed as your guide. When in doubt, go one flex softer — autoFlex rewards a smooth, free-releasing tempo.
Senior / Lady
Smooth tempo
Original Iron only
Regular
Mid-handicap
Both models
Stiff
Low handicap
Both models
X-Stiff
Tour level
Dream 7 only
Shop directly through autoflex.us or get fitted at an authorized Dumina dealer near you.