This brand new Amtech security door chain, model T1985, is designed to protect against burglary and theft. It features a locking ring for the handle and is suitable for almost any style of door. Installation is simple with no drilling or damage required to your door; it simply hangs from the door handle. The keep is wall-mounted with extra-long screws. Made from die-cast zinc, it's easy to install with mounting instructions included. The chain itself is 28cm with a 34 x 40mm loop.