SeaLux Marine Black Plastic Quick Release Round Base Surface Mount Bimini Top hinge/Fitting-Accon Marine 406 (2 sets) Surface mount Quick Release Black Powder Coated hinge--no cut-outs necessary.New round design fits more with the shape of the boat.Easily remove or install top without having to keep track of screws and pins.The hinge snaps into base and stays attached to bimini when saperated.Adapter can be inserted four different ways, 90° apart.SeaLux Marine Black Plastic Quick Release Round Base Surface Mount Bimini Top hinge/Fitting-Accon Marine Finish: Black Powder Coating INSTALLATION • Fasten with three #8 screws. DIMENSIONS • 2-1/2" Round x 5/8" High. Package contain 2 x Round Base Hinge and 2 x quick release clip