Quality Materials】 304 stainless steel rings made of high-quality raw materials. No rust, corrosion resistance, high hardness, non-toxic and pollution-free environment. Suitable for any scene. 【Easy to Install】 This product has 4 holes on the mounting surface with bolts to ensure sturdiness and safety, which works well in practical use. Pre-drilled expansion screws for concrete application installed in minutes. 【Spring Carabiner】 Versatile hardware for fastening, rigging and anchoring - Allows quick connection / disconnection of ropes, chains, straps; It opens and closes smoothly as the spring-loaded door makes it easy to secure important items. 【180° Rotation】180° rotation, custom-made silent nylon bushing and specially designed lubricating grease to avoid metal friction, creating a quiet, smooth and exceptional swinging motion, maintenance-free. 【Wide Application】For indoor and outdoor use, applicable to concrete ceilings and wooden beams, the best anchoring solution for all