Mortillet Rim Door Lock.

Usage: It is commonly used on steel doors and gates, and is suitable for both residential and commercial applications. It can be used in areas with a large flow of people. Functionality: The lock functions by extending a latch bolt to engage with a strike plate on the door frame. It can be operated by a key from the outside and a key or thumb turn from the inside. Material and Color: The lock body is typically made from durable materials like steel or stainless steel. The item pictured has a beige/brown finish. Installation: One of its advantages is the ease of installation. Security: While it provides enhanced security, it may not be as secure as mortice locks.