The Type 521 Gate Lock is purpose built for double gates. It is used in high security environments where the gate lock is either controlled at all times by supervising security staff or linked into CIL gate drives, where a fully automated system is required. All our Gate Locks have the facility for microswitch sensing for interlocking pairs of gates, providing a secure entrapment zone for either people or vehicles. Compatible with most forms of electronic access control equipment providing a voltage free contact is available.