Flat Ball Knob with Square Rosette, Interior Privacy Door Knobs Black Finish DLS09BKBK

• Confirm with ANSI Grade 3, Exceeds 200,000 cycles;
• 2-3/8" or 2-3/4" (60mm or 70mm) adjustable backset, fits doors thickness: 1-3/8" to 1-3/4" (35mm to 45mm);
• Dimensions : Knob Diameter: 2.2"(57mm) , Rosette Diameter: 2.56"(65mm). Note : The square plate of the latch is unremovable
• Universal handing; fits both right handed and left handed doors;
• Probrico new design, popular flat ball knob style with special square rosette.

Privacy: with lock function but keyless, you could locked inside, but can't open outside as there is no key. Usually for Bedroom/Bathroom door. (could open with coin in emergency)