Door chain is also called door security chain, chain lock, security chain, door safety chain, chain door lock etc. The door chain can be used on wooden door, metal door, hotel door, interior door, outer door, swing door etc. The door security chains we provide have different kinds, you can according to your needs to choose the appropriate one. According to the different function (concealed or surface, manual or automatic), the door chain can be fixed inside or outer. The main raw materials of door security chain can be stainless steel, zinc alloy, brass. The chain lock of each material are rustproof, strong and durable, just to choose the material which you want and rest assured of its quality. Beyond good raw material, we also treat the surface of chain door lock, good polish makes the door chain more smooth and beautiful. Choose us and You will get more benefit.