Satin Chrome Marine Grade Mechanical Keyless Storeroom Lever Lock with Passage FunctionThe LOCKEYUSA 3835 Satin Chrome Marine Grade is a commercial digital mechanical push button lever door or gate lock (gate boxes sold separately). The 3835 fits doors or gates that are 1 1 8 in. to 2 in. thick and can go up to 5 in. thick with an extension kit (sold separately). Included in the 3835 are rubber trim plates that will protect the lock from the elements. From the outside, the lock is opened with an easily customizable 2 digit to 5 digit