PRIVACY FUNCTION: The Gold Door Knob Has a Privacy Function, Lock/Unlock the Door By Pushing/Pulling the Locking Button for Use on Bedroom and Bathroom Doors or Doors Requiring Privacy ADJUSTABLE LATCH: Latch Can Be Adjusted to 2-3/8 or 2-3/4 Inch, Fit all Doors 1-3/8” to 1-3/4” Thickness EMERGENCY RELEASE FUNCTION: There is a Emergency Release Hole on the Exterior Rosette, When Emergency Happened, the Door Can be Unlocked from the Outside by Pushing a Hex Key(Included,Come With The Product) Through the Emergency Release Hole MATERIAL: Door Knob Made of Heavy-Duty Zinc Alloy, Advanced Electroplating Crafted in Luxurious Antique Brass, They Look Very Shiny and Gorgeous. Add a Touch of Luxury to Your Home COMPLETE ACCESSORIES: The Door Handle Contains all Accessories and Installation Instructions. If any Accessories are Missing, Please Contact Us SORWDUERM Privacy Door Knobs