The Cambridge Entry Door Knob in Matte Black will add simple style to your modern or rustic farmhouse entry decor. This knob accepts a key on one side and is operated by a turn-button knob on the other side. Perfect for front and back porch, garage, or patio doors. Designed for left- or right-hand doors, it will easily fit two common backsets (2-3/4-inch and 2-3/8-inch) and has a 1-inch by 2-1/4-inch radius round corner face plate. Use this hardware on standard 1-3/8-inch and 1-3/4-inch thick doors.