Korean Hidden Technology autoFlex Driver, Fairway and Hybrid Shafts

By Russ Ryden, Fit2Score, A Dallas Fort Worth Club Fitter & Builder
The Highlands Performance Golf Center, Carrollton Texas 
Golf Digest Certified America’s 100 Best Club Fitter

Korean Hidden Technology autoFlex Driver shafts came to the US market several years ago. I saw one in 2021. They cause a sensation with a $790 price point. They were very light weight and started a trend for light weight driver shafts. Ultimately most US golfers were not ready for light weight shafts at that price point.
I met with Korean Hidden Technology at the PGA 2025 merchandise show and shot an interview in their booth. They followed up with a shipment of review samples of every SKU they make. This is the first Korean Hidden Technology shaft that was available in the US in 2021. I had access to a single shaft then unlike now that I have measured all the shafts available at https://autoflex.us/. It was no small task measuring the 100+ shafts they supplied. KHT makes driver, fairway and hybrid shafts in each model family. Some models also have matched iron shafts. This is unique. The autoFlex is available in 4 color choices. That added some confusion to sorting the review samples. You must ignore colors and focus on the model designation printed on the shafts.