Product details:

The Design House 190723 Privacy Door Knob is used in bedrooms and interior applications and features a locking button on the inside knob (no keyed device on the outside knob). This knob can be opened in the case of an emergency by depressing or turning the locking mechanism on the inside. Use this knob on standard 1-3/8-inch and 1-3/4-inch thick doors with a cross bore 2-1/8-inch diameter or edge bore 1-1/16-inch diameter (1 inch x 2-1/4 inch radius corner faceplate).