Dexter Stratus Privacy Door Handle Satin Nickel a locking privacy knob designed for easy installation and compatibility with all standard door preparations. This handle features a privacy function with a turn-button locking mechanism that can be locked from the inside by turning the interior turn. It is crafted for residential single and multi-family doors and comes with a lifetime mechanical warranty and a 5-year finish warranty, ensuring long-lasting durability. The product meets ANSI A156.2, 1996 Series 4000 Grade 3 certifications and is U.L. Listed. It fits door thicknesses ranging from 1-3/8" to 1-3/4" and has a universal backset that accommodates either 2-3/8" or 2-3/4" backsets. Please note that this handle is not ADA compliant and features universal handing with decorative trim suitable for both left-hand and right-hand doors. Model Number: