I recently bought a used Duracraft stick steer boat(1999) . The previous(and original) owner used it very little and it had no rod holders one it. I wanted to avoid drilling holes as much as possible so I did a search on here for Duracraft and found Hoover Products. Turns out he (Jerry) is located here in my home state of SC. Those of you familiar with Duracraft remember they had a grooved rail around the gunnel to mount various items to. Duracraft dropped out of production for awhile, but are now back in business along with War Eagle boats which have a similar rail on it.
Jerry makes a rod mount in 3/8' and 1/2" which fit my rod racks and drift masters so I order 4 of each size. They do a great job and can be positioned anywhere along the rail and remove in a jiffy.
Here are a couple of pictures on how they work.
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Here is a link to the website: Products