The Design House 190702 Privacy Knob is used in bedrooms and interior applications and features a locking button on the inside knob (no keyed device on the outside knob). In case of an emergency, open this knob by depressing or turning the locking mechanism on the inside. This unit is finished in satin nickel, designed for left or right-hand doors, and fits the two most common backsets in the U.S. (2-3/4 inches and 2-3/8 inches). Use this knob on standard 1-3/8 inches and 1-3/4 inches thick doors with a cross bore 2-1/8 inches diameter or edge bore 1-1/16 inches diameter. Privacy knobs are often used in bedrooms and bathrooms and open with generic tools. 1 inch x 2-1/4 inches radius corner faceplate.