Make of heavy duty 304 stainless Steels, smooth, Rustproof and corrosion-resistant The closed eye hook Rings hook structure is strong and not easy to break, which can bear huge weights Suitable for indoor or outdoor installation on wood ceilings, concrete ceilings, brick wall, boats, hammock chairs, slings, wire rope, chains, hanging plant Our Pad Eyes for various kind of buckles, Mainly used for ceiling & wall mount hanging hardware fitting, also used in small yachts and boats : When installing, just put the expansion screw into the drill hole, place stainless Steels ceiling Hook, and secure it with the screw, Manufacturer: Oxxggkao