Schlage Single Cylinder Deadbolt with Addison Trim, Matte Black (B60 N ADD 622) For more than 95 years, Schlage has offered durable door hardware in a range of unique style combinations to express any personality Guaranteed to fit on existing, standard pre-drilled doors Unique Snap & Stay design holds deadbolt in place while tightening screws Deadbolt thrown or retracted by key from outside or by inside turn unit Lock and finish backed by limited lifetime warranty