Double cylinder deadbolt For single family and multi-family doors Deadbolt thrown or retracted by a key from either side Bolt automatically deadlocks when fully thrown ANSI grade 3 certification Schlage C keyway with two brass keys, locks are keyed 5-pin Universal latch standard fits either 2-3/8 or 2-3/4 backsets 1-3/8 to 1-3/4 standard door range 1 housing diameter throw latch 1-5/8 x 2-1/4 square strike plate and strike frame reinforcer standard