Some types of locks for iron gates include deadbolt, latch, magnetic, slide bolt, vertical hasp, padlock and keyless mechanisms. Each type of lock is generally suited for a specific application. Deadbolt and keyless locks, for example, provide the most security.
A deadbolt lock is a solid metal piece that is separate from the knob. It requires a key for exit and entry. A keyless lock is a battery-powered, solid metal piece that includes the door handle and a key pad. Exit and entry require a correctly-entered keycode. Gates that provide safety for children and animals, such as a swimming pool gate, typically use latch, magnetic, vertical hasp, slide bolt and padlock locking mechanisms.