Function Introduction: Keyed Entry Function:Keyed entry (single cylinder) door knob/lever sets are keyed on the exterior with an associated thumb turn on the inside that can quickly and easily lock or unlock the latch mechanism. Single Cylinder Deadbolt Function:Single cylinder deadbolts are keyed on the exterior with an associated thumb turn on the inside that can quickly and easily lock or unlock the latch mechanism. Double Cylinder Deadbolt Function:Double cylinder deadbolt is operated by keys both outside and inside. Double Security. Product information: --Product Type: Entry Door Levers with Single Cylinder Deadbolt Set --Color & Finish: Matte Black --Material: Solid Steel(Latch), Stainless Steel(Handle) --Handing: Left, Right, Universal --Certification: ANSI Grade 3, Exceeds 200,000 cycles --Dimension: Adjustable Latch with backset: 60mm (2-3/8") or 70mm (2-3/4 ''); fit all doors 35 to 45 mm ( 1-3/8 '' to 1-3/4 '')thickness --Warranty: Lifetime finish and mechanical guarantee --Usage: Door konb with deadbolt for use on exterior doors where keyed entry and security is needed Package Includes: --Selected Keyed Entry(Keyed Alike) Door Lever+ Selected Deadbolt; --Installation Screws; --Installation Instructions. Home Improvement Direct provides Entrance(Same Key)/Entrance(Not Same Key)/Privacy/Passage/Dummy Door hardware. Please contact us if you need these products.