Schlage Residential J54 Byron Knob Entry Lock with C Keyway and Triple Option LatchProfessional Residential Entry Lock SolutionThe Schlage Residential J54 Byron Knob Entry Lock delivers reliable entrance security with classic residential styling. This Grade 2 cylindrical lock features a 5-pin C keyway cylinder, dual backset compatibility for 2-3/8″ or 2-3/4″ installations, and accommodates door thickness from 1-3/8″ to 1-3/4″. The lock includes a triple option latch (16255) with round, square, and drive-in configurations plus a full lip strike (10101) for versatile installation requirements.Professional Features & BenefitsDoor Thickness Compatibility: Designed for 1-3/8″ to 1-3/4″ doors with dual backset options for 2-3/8″ or 2-3/4″ installations.Grade 2 Commercial Rating: ANSI/BHMA A156.2-2011 Commercial Grade 2 certification provides reliable performance for residential applications.Versatile Latch System: Triple option latch (16255) includes 1″ x 2-1/4″ configurations with round, square corner, and drive-in options for various door preparations.Professional Cylinder Security: 5-pin C keyway cylinder keyed alike (KA4) with two keys per lock for consistent access control.Easy Installation Design: Simple 3-step installation process requires only a screwdriver for quick professional setup.Fire Door Option: Available UL Listed configuration for 3-hour fire door applications (J54 function specific).Complete Hardware Package: Includes full lip strike (10101) with 1-5/8″ x 2-1/4″ radius corner design for secure door frame integration.Standard FeaturesCertification:ANSI/BHMA A156.2-2011 Commercial Grade 3Available option for UL Listed for 3 hour fire door (J10 and J54 functions onlyLatch: Dual Option: 1″ x 2-1/4″, 1/4″ round faceplate and drive-inTriple Option: 1″ x 2-1/4″, square corner and 1/4″ round faceplate, drive-in latch (J54)Strike: 1-5/8″ x 2-1/4″ radius corner, full lip, no boxBackset: Dual backset latches, fits either 2-3/8″ or 2-3/4″ backsetsCylinder: 5-Pin, C keyway, keyed alike (KA4)Door Range: 1-3/8″ 1-3/4″Keys: Two per lock, 5-pin, C sectionInstallation & OperationReview manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces.Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.Professional ApplicationsResidential Entry DoorsMulti-Family Housing UnitsApartment and Condominium BuildingsSingle-Family Home ConstructionResidential Renovation ProjectsProperty Management ApplicationsHome Security UpgradesWhy Choose Schlage Residential Quality?Schlage Residential J Series locks deliver professional-grade reliability with ANSI/BHMA Grade 2 certification and versatile installation options. The triple option latch system and dual backset compatibility ensure proper fit across various door preparations. Engineered for demanding residential applications where dependable entrance security and classic styling are essential. Backed by Schlage’s Lifetime Limited Mechanical and Finish Warranty.