The new 660/800 actuators from Tie Down Engineering feature the Drop N Go Auto Latch Coupler. In the closed (tow) latch position, it will auto-latch onto the hitch ball when set on top with minimal weight. Solenoid plumbing built into the master cylinder eliminates removal of the entire solenoid for servicing, detachment of brake hose, detachment of the actuator cover and detachment of the actuator from trailer tongue. Additional features include cast steel ball clamp, grease fittings on roller pins, safety pin that locks the ball clamp, not the handle, oversized aluminum master cylinder and a coiled, PVC-coated emergency stop cable.