Just installed these to replace my salt water trailer. Unlike many of these trailer lights which use a plastic housing and slot to insert a carriage bolt to tighten on a trailer which sometimes means the carriage bolt comes out of the groove and cannot be tightened. This brand uses a threaded brass bushing built into the body to accept a threaded bolt which is then bolted to a nut on the trailer bracket. This ensures a solid installation. Oh, and that light is bright enough. I can't confirm durability. The time will show.
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