IMPORTANT: This model cannot be installed on pre-drilled doors prepped for 2-1/8", as the rose will not cover the borehole. If your door has a pre-drilled 2-1/8" borehole, select a knob or lever with standard sized rosette choices (See Item #: LL90R68-PR) privacy-functionPrivacy Function: Privacy door hardware features a locking mechanism on the interior for use on bedroom and bathroom doors where locking is needed. The exterior side features a small pin hole to unlock the door hardware from the outside. Features: Exceeds criteria for BHMA Grade 1 certification Constructed of marine grade 316 stainless steel Corrosion-resistant material suitable for industrial and marine settings This lever is reversible for right or left handed applications Premium quality 28 degree latch requires less rotation than standard latches Covered under a limited lifetime mechanical warranty Complies with Americans with Disabilities Act (ADA) Specifications: Backset: 2-3/8" or 2-3/4" Cross Bore: 3/4" Edge Bore: 1" Door Thickness: 1-3/8" to 2-1/4" Handing: Left, Reversible, Right Lever Length: 5-5/16" Rose Diameter: 2-1/16" Projection: 2-1/4" Latch Faceplate: Square Corner Product Variations: LL90R52-PA: Passage Door Lever Set LL90R52-PR (This Model): Privacy Door Lever Set LL90R52-SD: Single Dummy Door Lever LL90R52-FD00: Dummy Door Lever Set