These double-ended bolt snap hooks are made of zinc alloy with a black finish, luxurious and elegant, sturdy and durable, rust-proof and corrosion-resistant.Designed for use with ropes, chains, straps, animal leashes, horse tack, and other home, farm, and recreational applications. Can be used for a gate latch, bucket hanger, feed troughs, hay bags in the barn, and many other different applications. Attaches to any standard D-ring. Perfect for connecting your keys to your belt.The double-ended design makes bolt snap hooks more versatile. Spring-loaded screws ensure a secure closure and an easy-to-open thumb lever.Spring-loaded screws ensure a secure closure and an easy-to-open thumb lever. Do not overload for your safety, maximum load 50 kg.