
Frank Marine
This one is the through-bolt holder rather than the rail clamp. It fits flat to a gunnel, coaming or transom and stays put permanently. If you do not want to drill holes in your boat, the rail-mounted version is the one to look at.
On fibreglass or thin alloy, yes. A hooked fish loads a rod holder hard and the fasteners will pull through or craze the gel coat without something spreading the load. Large fender washers work; an alloy or stainless plate under the gunnel works better.
It can be. Stainless against bare aluminium in saltwater sets up galvanic corrosion, and the alloy is the side that suffers. Isolate the two with nylon washers or a barrier compound on the fasteners, and rinse the area down after saltwater trips.

Frank Marine

Frank Marine

Frank Marine

Frank Marine

Frank Marine

Frank Marine
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