DoorKing was founded in 1948 and is one of the largest and oldest manufacturers of vehicular gate operators and access control systems in the country. DoorKing products are designed and built in the USA at our Inglewood, California manufacturing facilities. We offer a full line of vehicular gate operators and maximum security operators, single and multi-door access control systems with wireless expansion options, and a full line of card readers, remote transmitters and internet and cellular connected devices to meet all of your access control needs.