These mortise door bolts provide additional hidden locking points, effectively enhancing the safety of your door and window. Can be installed near the top and bottom of the door Copper mortise bolts resist rust and ensure long term durability These mortise bolts are perfect for doors and hallway doors. Not only is it suitable for security but also for modern interior and exterior installations For residential or commercial use, it provides additional security by providing a locking mechanism that blends seamlessly with the door design Mortise rack bolts are easy to install and use. The standard star (included) also allows for smooth operation of the bolt and easy opening and closing, Manufacturer: Netbiio