Introducing the new Dexter DX6.6 Disc Brake Actuator. (Formerly Tie Down Engineering 660E) Equipped with the new "Drop N Go" latch mechanism. The quick lock mechanism will automatically lock when lowered onto the hitch ball. Fits 2" balls and mounts onto a 3" trailer frame. Bolt on design. Rated up to 6,600 lbs GTW with a maximum tongue weight at 660 lbs.