Built-in locks are security features integrated directly into doors, cabinets, or other furniture. They provide a convenient way to secure items without needing an external lock or key. These locks can be mechanical or electronic, offering various levels of security depending on the design and materials used. Many modern homes and offices use built-in locks for added safety. For example, smart locks allow users to control access through smartphones, while traditional deadbolts offer reliable protection against unauthorized entry. Built-in locks are essential for safeguarding personal belongings and enhancing overall security in residential and commercial spaces.