A latch, often referred to as a catch, is a mechanical device used to secure doors, gates, or cabinets. It typically consists of a movable bar or bolt that fits into a slot or catch, allowing the door to be held closed. Latches can be simple, like a sliding bolt, or more complex, such as those found in automobiles or furniture. Latches are designed for ease of use and can be operated with one hand. They come in various types, including spring latches, deadbolts, and hook latches, each serving different security and functional needs. Proper installation ensures effective operation and safety.