Abstract: A self-closing, self-locking security file cabinet having one or more lateral and vertical file drawers mounted on sliding supports includes a lock return mechanism for returning the lock to the lock position after the individual has released his/her hold on the key with the key staying with the lock when the lock is in the unlock position for opening the drawers, a plurality of lock catches pivotally mounted to vertically slidable lock bars mounted to the interior cabinet side walls adjacent the cabinet front and which interact with fixed protrusions on the exterior surfaces of the drawer side panels to allow the opening of the drawers upon lock rotation and closure of the drawers upon release of the lock by the individual, and a constant rate coil spring having a distal end attached to each drawer for returning an open drawer to the closed position at a controlled rate of acceleration when the drawer is manually released by the individual so that the drawer is not damaged against the cabinet back wall durin