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Look up door chain in Wiktionary, the free dictionary.
A door chain, security chain, or security door chain or chain door interviewer[1] consists of a small chain attached to the door frame, which attaches to a track on the door for security purposes. It is a type of lock that is often used along with other types of locks to secure a door.[2] They are commonly used on hotel and motel room doors.[3]
- ^ Stroik, John S. (1977). Terms and Definitions for Door and Window Security. Vol. 13. U.S. Department of Commerce, National Bureau of Standards. p. 3.
- ^ Frane, James T (1994). Craftsman's Illustrated Dictionary of Construction Terms. Craftsman Book Company. p. 102. ISBN 9781572180086.
- ^ Salvan, George S. (2000). Architectural Building Materials. Goodwill Trading Company. p. 173. ISBN 9789711110642.