These slide hinges are made of marine grade 316 stainless steel materials, corrosion resistant in saltwater environment, not easy to rust, and hence, expect it to last longer. Boat rail hinge clamp has high polished surface for mirror-like appearance to match boats, yachts, fiberglass yachts, inflatable yachts, commercial yachts and other types of yachts. Split design can be added to existing frames without any dismantling. Package Includes:2 pieces of quick release jaw slide and 1 piece of L shape hex allen wrench.