A tower bolt, also known as a necked tower bolt or a barrel bolt, is a type of latch commonly used to secure doors, gates, windows, and other similar items. It consists of a metal bolt that slides into a metal plate, which is mounted on the surface of the item being secured. The bolt is usually operated by turning a knob or lever, and it is designed to provide a secure locking mechanism that is difficult to tamper with. Tower bolts are available in various sizes and materials, including brass, stainless steel, and zinc, to suit different applications and environments. They are widely used in both residential and commercial settings and are considered a reliable and affordable solution for securing doors and other items.