Design House 781906 Tulip 2-Way Adjustable Privacy Door Knob, Satin Nickel Finished in Satin Nickel and designed for left or right hand doors ANSI grade-3 certified for residential security Fits 2-3/4-inch and 2-3/8-Inch backsets; fits 1-3/8-Inch and 1-3/4-inch thick doors Privacy lock; locks from the inside with a turn-button and feature clearance hole on outside knob/lever to permit emergency release with a nail or like object Comes with a limited lifetime mechanical warranty and a 5-year finish warranty