In 2009, D.A. introduces its new generation WINE manual door lock system called Rapid-Release . The Rapid-Release cam lock system is based on our proven single door cam lock technology, but features simultaneous control of a pair of hopper doors. The locking points are on both sides of the car for strong support and the cam lock assembly is designed for easy application to conventional open top hopper cars. It can be readily applied to new or existing new equipment. Best of all, one person can operate the Rapid-Release cam lock from either side of the car.