This Brinks heavy-duty interior door knob comes with a key and is suitable for use on interior doors. The polished brass finish adds a touch of elegance to any room, and the traditional style complements a variety of decor. The tulip knob design is easy to grip and turn, and the item includes a single knob, making it ideal for replacing an existing door knob or for use in new construction projects. The knob diameter, item height, and item width can be determined by referencing the pictures provided. The door knob is made of durable brass material and is suitable for use on interior doors in various rooms. This product is brand new and comes in an open box.