autoFlex
autoFlex Original Iron Shafts
Buy direct from headquarters
- Zero risk of counterfeits. Every order ships from DUMINA Golf America, the official U.S. distributor.
- Exclusive 2-year warranty on new shafts: the standard 1 year plus an extra year, only when you buy from us.
New color
Black is now available in the autoFlex Original.
Not sure which flex? Book an HQ fitting · Try the online fitting tool
Details & specs
Experience improved accuracy and greater control of your golf ball with the AutoFlex Iron Golf Shaft. This advanced technology is designed to maximize your swing and deliver consistent power with each shot. Enjoy improved ball striking and increased distances on the fairways with the AutoFlex Iron Shaft.
The decreased mass and K.H.T maximizes the transmission of force for elevated ball velocity, resulting in further carry distance and run.
Length – Uncut 39" inch
Tip Size – 0.370
| Flex | Weight (g) |
Recommended Swing Weight |
Driver Club Speed |
| SF305 | 47 | D0-D2 | 75-90 |
| SF405 | 50 | D0-D2 | 85-100 |
| SF505 |
53 | D0-D2 | 95-105 |
Fitting guide
Driver
- Never tip cut
- Only cut on the butt end
- Recommended swing weight within C8–D1 (lower than D2 is ideal)
Fairway wood
- Women's: same spec as driver
- Men's: one spec higher than driver
- 3W
- No tipping
- 5W
- Tip 0.5"
- 7W
- Tip 1"
Hybrid
- Men's & women's: one spec higher than fairway wood
- 3H
- No tipping
- 4H
- Tip 0.5"
- 5H
- Tip 1"
Iron
- 4I
- No tipping
- 5I
- Tip 0.5"
- 6I
- Tip 1"
- 7I
- Tip 1.5"
- 8I
- Tip 2"
- 9I
- Tip 2.5"
- PW
- Tip 3"
- Women's wedges: tip 3.25" with the same spec
- Men's wedges: tip 3" with one spec higher
Shipping, returns & warranty
Free ground shipping (3–5 business days) within the contiguous U.S. UPS 2nd Day and Next Day Air, and orders to Hawaii, Alaska, Puerto Rico and other countries, ship at UPS rates shown at checkout. In-stock orders ship within 2 business days; custom builds add 2 business days.
30-day returns. Return a shaft within 30 days if it is brand new, uncut and never installed: 100% back as store credit, or 85% back to your original payment (15% restocking fee). Discounts and shipping are not refundable. Clothing can be returned or exchanged within 30 days if unworn, unwashed and with tags attached.
Fit exchange. Not the right fit? Exchange your shaft once within 30 days for a different flex of the same model.
Warranty. A 1-year warranty on all shafts, plus an exclusive extra year (2 years in total) on new shafts bought from autoFlex.us, our flagship store.
Final sale: limited editions, gift cards, certified pre-owned shafts and accessories other than clothing. International orders cannot be returned or exchanged.
- Buy directZero counterfeit risk
- Free shippingU.S. ground, 3-5 days
- 30-day returnsOne free fit exchange
- Made in KoreaKorean Hidden Technology
- 2-year warrantyExclusive to autoFlex.us
