I bought a couple of Attwood rod holders to mount on my MV1648 SeaArk. I wasn't sure if I'd like them or not and didn't want to make any permanent modifications to my boat, so I came up with this: Run the carriage bolt throught the washer in the channel of the gunnel (a little tricky at first). and simply fasten the holder with a nut (I used a slightly longer nut). Not only is it not permanent, but it's versatile as well. If I want to move a holder to a different location ie. closer to me or to a fishing buddy, or out of the way, a few quick twists with my trusty 3/8" nut driver and I can slide it the length of the gunnel.