Baldwin Hardware for more than 50 years has been setting the standard for high end decorative hardware. This Baldwin Hardware Estate series Bristol 6420.ENTR Single Cylinder Handleset is manufactured of solid forged brass for maximum strength and durability. This handleset requires 5-1/2" CTC (Center to Center) bore holes. If you have any questions at all or would prefer to order by phone please call (866)259-8901. We are here to Help!