Single Cylinder Exterior Entrance Lock from the Ashcroft CollectionSingle cylinder handle set exterior.Latch retracted by thumb piece from out side or by inside knob/leverTriple Option- latches and universal backsets for effortless installationLifetime Limited Finish and Mechanical Warranties on all handle setsDecorative thumb turn designConcealed mounting screws3" screws and steel door frame reinforcers; provides maximum protection against violent forced-entry attacksRevolutionary adjustable through-bolt that can move up and down 1-1/2" to fit a variety of pre-existing holesFlush cylinder design Faceplates (Part 16-235): Supplied with 1/4" Round Corner, Square Corner and Drive-In FaceplatesStrike Plates (Part 10-248): Supplied with a Round Corner Deadbolt Strike (10-094), Square Corner Full Lip Strike Plate and Round Corner Full Lip Strike Plate (10-063) with Dimensions of 2-1/4" x 1-5/8"