If your lock set is acting up or broken, this mortise lock set is the perfect choice for updating and fixing hardware on interior doors. Made from steel and featuring a classic bronze plated finish, it has a beautiful traditional look with modern construction! It can be used for left or right-hand installations, and has a lock bolt that is key activated from both the inside and outside. It can be used as a privacy lock on bedrooms, bathrooms and other interior doors. When you are updating hardware on older interior doors in your home, this mortise keyed lock set with a classic bronze knob is the perfect choice! This lock set fits 1-3/8 inch to 1-3/4 inch interior doors, and can be easily installed. The key will only unlock from 1 side by design. Only hand tighten using hand tools so the screws do not strip. Dimensions are 3-9/16 inch tall, 3 inch deep and 1/2 inch wide.