This set of chain and snap component parts is designed for hold-back assemblies and is made of durable steel with a zinc-plated finish. Each set includes the necessary components and is sold individually to fit Fleet Engineers chain and snap hold-back assembly. It is also compatible with most door systems, making it a practical and versatile choice for any application. With its sturdy construction and easy installation, this product is a reliable solution for securing doors and preventing them from swinging open.