Boat bimini top hinged made of high quality 316stainless steel, wear-resisting, anti-corrosion, anti-rust,can be used for a long time Boat Jaw slide rail fits 1-1/4" OD round tubing Bimini top hinged clamp mounts highly polished,heavy duty Boat bimini top hinge rail mount 1-1/4" have a Long life-span Package include:2 PCS boat rail rail mount hinged, bimini jaw slide 1-1/4" JY-MARINE stainless steel marine bimini top jaw slide is made by stainless steel 316,corrosion-resistant,anti-corrosion, anti-rust,excellent for bimini top,easy to install and adjust. Heavy duty quality stainless.it is high polished like mirror.can be used for many years.