Kwikdox 4-Hole Backing Plate is used as a large washer on the opposite side of the wood from another Kwikdox component to strengthen the connection and help spread the applied load across a much larger surface of wood. It is most commonly used opposite components (dock hinges, chain brackets, dock post mount brackets) that cannot be lined up to share mounting bolts with a corresponding corner bracket.
Holes sized for 3/8" fasteners. Hole pattern matches all Kwikdox (and some other manufacturers) dock hardware. Manufactured by Kwikdox in Canada from North American Steel.