Frequently asked questions

For the full details, see our return and refund policy. In short, for new shafts:

• Within 30 days of delivery, you may request a return if the shaft is brand new, uncut and never installed.
• We credit you 100% as an in-store gift card, or 85% back to your original payment (15% restocking fee). Discounts and shipping are not refundable.
• Not the right fit? You can exchange a shaft once within 30 days for a different variant of the same model, for example a different flex.
• Unworn, unwashed clothing with the tags attached can be returned or exchanged within 30 days.
• Limited editions, gift cards, certified pre-owned shafts and accessories other than clothing are final sale.

Standard ground shipping (3–5 business days) is free within the contiguous United States. UPS 2nd Day Air and Next Day Air are available at checkout for faster delivery, and orders to Hawaii, Alaska, Puerto Rico and international destinations ship by UPS; those rates are shown at checkout. In-stock orders ship within 2 business days, and custom builds add 2 business days. See our shipping policy for details.

Every shaft has a 1-year manufacturer warranty from the date of purchase. New shafts bought directly from autoFlex.us, our flagship store, get an exclusive extra year: 2 years in total. See the warranty section of our return and refund policy for how to make a claim.

As with most tech enhancement features from golf manufacturers, Golfers with higher swing speeds tend to see bigger increase in club head/ball speed and distance.

For drivers, golfers below 100mph swing speed tend to see on average 2~4mph faster and 5~10 yards longer, while 110+ mph golfers report average gains of 3~10mph and 10~25 yards, respectively.

Remember that all golfers are different with varying angle of attack and swing mechanics. Fitting the autoFlex shaft to best suit your particular swing style is recommended for best results. Just like any product with an instruction manual, the autoFlex shaft works best at recommended swing weight with the smooth take away and transition. It is not designed to magically fit all swing types, but will help golfers to swing at a more smooth tempo.

In that case, we would recommend you purchase a shaft from our website, try it out, and if unsatisfactory, you can take advantage of our return policy.

No, color is simply for aesthetic purposes, so feel free to choose whichever color you'd like!

At the moment, we unfortunately do not sell built hybrid & iron shafts, only raw/uncut ones. Feel free to order them raw/uncut, and take it to your local golf shop to have them customize the shaft to your desires. We sincerely apologize for the inconvenience.

Unfortunately, at the moment, we do not process any trade-ins for shafts that were not directly purchased from our website. We sincerely apologize for any inconvenience. Please contact your original seller for additional support.

Usually, they take within 1 week, however due to potential customs/duty issues from Korea, they may take longer (up to 3 weeks but very rare) to arrive. We apologize for any such delays in advance.

The only grips we have available are what you see on our website. If none of the grips are satisfactory, please feel free to choose [Grip Installation: Not Installed] so that you can have your local clubmaker install it with the grip of your choice. We apologize for the inconvenience.

Unfortunately, we currently do not have any .355 iron shafts available. We have inquired autoFlex Korea (the manufacturers) regarding this, however they have told us that at the moment, they do not plan on making .355 iron shafts, only in .370.

However, while not entirely recommendable (and will void your warranty), it is not impossible to use our iron shafts for a .355 iron head; what you can do is have your clubmaker sand down the tip quite a bit such that the shaft tip is thin enough to fit inside the iron hosel. Or a better option would be to bore the hosel to .370 of an inch with a drill press. This wouldn't guarantee the full performance from the shaft, however we have seen it work a handful of times and the players haven't found much issues from it. This is NOT a service we offer unfortunately.

The difference between all 3 of the autoFlex models would be the target audience, as one model may result in better performance for certain players, whereas another model may result in better performance for other players. Ultimately, a premium golf shaft should feel good and right to the player's body.

Both of the newer generation(Dream and Joy) shafts carry the same concept as the Original (easy to swing and increase kick at impact), but the materials have been upgraded to the latest and greatest carbon prepreg material from Japan for both, which has allowed the shaft to feel even better. Their KHT (Korean Hidden Technology) is now in their 2nd generation. This is their special sauce, we don't know how, we just know it works.

We have posted the recommendation tables on each product-page for reference.

Original - The stiffest overall, has the original autoFlex feel.

Joy365 - Softer feel in the hands than the original and even more kick - designed for slower swinging players to help gain the most efficient height while being very easy on the hands (ex. ladies and seniors)

Dream7 - Slightly softer than the original but with an upgraded tip section for more stability and power at impact.

In such cases, we then ask you about your swing transition style:

- If your swing transition is aggressive/rough, then go for the higher flex of the two

- If your swing transition is smooth/slow, then go for the lower flex of the two

The intent of the manufacturer was for a shaft to provide distance and accuracy with a smooth swing; and not maximum effort with every swing.

CAUTION: High swing speed golfers should not attempt to swing lower spec autoFlex shafts that are more flexible. It may cause the shaft to bend and fracture if swung too hard. (i.e. SS 110+ mph golfer should not try to swing the SF305X or the SF405 hard.)

Roughly speaking, swing weight is the measurement of its balance point based on a scale using a 14″ fulcrum (which most golf shops should have). The metric is represented with a letter (A to F) and a number (0-9), where A0 is the lightest swing weight possible and F9 is the heaviest. Each club has a different swing weight based on shaft weight, length, head weight, grip weight, and other various factors that are unique to your club. You may need to adjust components of your club to land your swing weight within the recommended swing weight range listed on our website for your shaft. Some ways you can adjust swing weight are:

1) -2g off of head weight = -1 SW

2) -1/2" off butt end of shaft = -4 SW

3) +5g grip = -1 SW

and the opposite is true (example: +2g to head weight = +1 SW)

For drivers, we recommend a swing weight between C8 and D1; lower than D2 is ideal. Slower-swing models (such as SF305x and SF405) work best at the lighter end, and the stiffer X and XX models (SF505x and SF505xx) can go a little heavier. For fairway woods and hybrids we recommend D0~D2, for irons D0~D1, and for wedges D1~D2.

The unique characteristics of autoFlex shafts make it lighter than conventional shafts with a much lower cycles per minute. Due to the more flexible nature, a higher swing weight may cause the club head to wobble on the downswing transition. This may result in an off-centre impact for loss of distance and accuracy. Many golfers do well around D0, and golfers with the stiffer SF505x and SF505xx shafts can go a little heavier. Try various swing weight configurations to see what is optimal for you and your swing type.

Counter balancing the grip end can help achieve the swing weight, and it may be helpful to some degree (ie. If the swing weight only needs to decrease by 1 point). However, if the swing weight is too high, adding weight to the butt end increases overall driver weight. Also, the club head will still be too heavy despite the “correct swing weight”, so it may still move too much during the swing. It is better to see if your driver head has inter-changeable weight kit with lower weights. Also, some golfers have mentioned filing down their current weights.

The raw uncut length is 45 inches, so when fitted to a driver head, the shaft length comes to about 46.5~47 inches. There is no ideal length and the butt end can be trimmed to make any total driver length depending on the individual golfer preference (between 44~47 inches).

No. The autoFlex shaft was not intended to be only used as a long drive shaft. Rather, DUMINA Co. intended the shaft to help make the game of golf easier by helping slow an average swing speed golfers swing faster without swinging harder. Having said that, the autoFlex shaft line-up can cover from 65mph to 140+mph swing speeds and is used in long drive competition.

Here are the updated tipping/trimming instructions for autoFlex shafts;

Driver - No tip trim. Cut from butt end only.

3 wood - No tip trim. Cut from butt end only
5 wood - Tip trim 0.5 inch. Cut butt end to desired length.
7 wood - Tip trim 1 inch. Cut butt end to desired length.

3 hybrid - No tip trim. Cut butt to length.
4 hybrid - No tip trim. Cut butt to length.
5 hybrid - 0.5 inch tip trim. Cut butt to length.

3 iron - No tip trim. Cut from butt only.
4 iron - No tip trim. Cut from butt only.
5 iron - Tip 0.5 inch. Cut butt to length.
6 iron - Tip 1 inch. Cut butt to length.
7 iron - Tip 1.5 inch. Cut butt to length.
8 iron - Tip trim 2 inches. Cut butt to length.
9 iron - Tip trim 2.5 inches. Cut butt to length.
PW, GW, SW - Tip trim 3 inches. Cut butt to length.

No putter shaft is manufactured.

Most golfers that have seen success with autoFlex have reported higher launch angles. This is due to the lower cycles per minute (flexible) shaft kicking at impact for an uptick in dynamic loft.

Thus, the higher ball flight is not due to an increase in back spin, but higher launch angle. So the higher launch angle coupled with low spin will provide more carry distance with roll distance.

First thing to check is to see if you are impacting the center of the clubface. autoFlex does not guarantee a center strike every time. If it seems that you are way off the sweet spot, be sure to check your swing weight (swing balance) to see if the head feels too heavy. As mentioned above, DUMINA recommends a driver swing weight between C8 and D1: lighter for slower-swing models, a little heavier for SF505x and SF505xx. But if you do not see distance gains and way off-center dispersions (inconsistent impacts), then try to further lessen the swing weight. Some 110+mph hitters have reported that D0 (even C8) swing weight stabilized the head even more for speed and accuracy. Next, check your angle of attack to see if you are in the negative loft. Unless you have a faster swing speed (in excess of 110mph), a positive angle of attack will be more beneficial in getting the ball up in the air with less back spin. In hitting up on the ball, some found that moving the ball an inch or two toward the left foot at address helps to hit up and create a positive angle of attack. Lastly, check to make sure the shaft is not cracked or splintered. If damaged, the shaft may not be able to deliver the proper load and release on impact.

Yes. Please submit a ticket with the order number for the shaft and we will be happy to help. New, uncut, uninstalled shafts can be returned within 30 days for 100% store credit or 85% back to your original payment, or exchanged once for a different flex of the same model.

Please allow our receiving department to process and verify the returned shaft, which may take 1-2 business days. We will try to get to your shaft as soon as possible. We sincerely thank you for your patience.

In-stock orders ship within 2 business days, and custom builds add up to 2 more business days to build your shaft. Standard ground shipping within the contiguous U.S. is free. Unforeseen issues can occasionally cause a short delay; if that happens, we will let you know as soon as possible.

From the date of refund initiation, please allow your bank up to 10 business days to fully process the refund. Please note that after we submit the refund process, we cannot expedite the process whatsoever, as the rest of the process is done fully by your bank/service provider.

Of course. Please submit a ticket with the order number and we will be happy to help.