The seat latch hinge is lock and release and is fit for zero gravity chairs, lounge chairs, recliners, folding camping and beach chairs, etc. Specification Color: Black Material: Plastic Buckle Inner Diameter: 17mm / 0.7 inch Overall Size: 65 x 53mm / 2.5 x 2 inch (L*W) Package Content: 2 x Seat Latch Hinge Advantages Made of plastic material and fine workmanship, it is solid and durable, wear resistant, and not easy to break. Simple to operate, and wide applications are fit for universal folding chairs. Instruction Easy to install, equipped with screws, it only takes a few minutes to install and secure it. Notice Please allow a slight tolerance due to manual measurement.