Function Introduction: Keyed Entry (Single Cylinder) Function:Keyed entry (single cylinder) door knob 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 units are commonly used on a front, side or back entrance but can also be found on interior doors as well, depending on application. 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. Single cylinder locks are most commonly used to secure entrances to a residence or place of business. Product information: ●Product Type: Entry Door Knobs with Single Cylinder Deadbolt Set ●Color & Finish: Flat Black ●Material: Solid Steel(Latch), Stainless Steel(Handle) ●Certification: ANSI Grade 3, Exceeds 200,000 cycles ●Package Include: Door knob, Latch, cylinder, mounting screws, strike plate and installation instruction ●Usage: Door konb with deadbolt for use on exterior doors where keyed entry and security is needed ●Warranty: 3 years color & finish warranty, replacement or refund for any Quality problem ●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 Package Includes: --Selected Keyed Entry(Keyed Alike) Door Knob + 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.