We are a dealer for Hitch Hinge dock hinges. We will be using these hinges from now on on all of our dock build that require hinges. These hinges are also great for retro-fitting onto an older dock as they can simply be bolted onto an existing aluminum or wood frame. These hinges are a huge improvement over the standard dock hinges design, they are quite and there is no parts that can fall out or go missing. Please visit their website for more info.