3/4" x 2-1/4" 1" Concave Base Stainless Steel Deck Hinge with 1/4" Toggle Pin (270245-1) by Sea Dog®. Deck hinges are designed to mount horizontally and attach an eye end in Bimini top applications. Concave hinges are designed to rail mount on 1" tubing. 180° adjustable hinge allows universal mounting at almost any angle including vertical mounting.
Removable pin versions feature a spring loaded quick release pin for easy top removal. Angled hinges are used for mounting items on slanted surfaces like sloped gunwales.