EASY INSTALLATION: Install your door knob set in a flash. All you need is a door and a tool set! No need for professional door fitters, you can do it yourself! PRIVACY FUNCTION: The interior door knob can be locked inside and opened outside in emergency WITHOUT keys. Use it for your guest rooms, bedrooms, bathrooms, interior locking doors and other privacy needs; Material: Metal; Finished Color: Matte Black. ONE SIZE FITS MOST: This black door knob fits 1-3/8" to 1-3/4" doors; Reversible for both left handed and right handed doors. (Notice: The latch plate is unremovable.) DURABLE QUALITY: The solid steel & stainless steel, smooth finish, polished appearance and substantial, easy-to-grasp door knob will subtly elevate and enhance commercial areas or residences alike. CLASSIC DESIGN: Its not just a door knob its a statement piece. These gorgeous knobs with no protruding flanges, screws or rough edges ensures completely safe and easy operation, are sure to add a touch