Tie Down Engineering Actuator Model 66 Drum BrakePre charged dampener unit, eliminates "pumping" before bleeding the brakes 2" coupler in closed position will auto latch on the hitch ball Larger fill cap on master cylinder, easy to remove, easier to add brake fluid Standard length actuator cover Cast steel ball clamp and latch handle Stainless steel safety pin Aluminum master cylinder Coiled E stop cable, PVC coated Grease fittings on roller pins Model : 660 Drum Brake Ready Capacity : 6,600 lbs