Trimax's Deluxe 7/8" Span Coupler Lever or trailer door latch lock features a Zinc alloy and protective rubber bumper to protect from abrasion and rattling. This multi-use coupler trigger is great for trailer door latches and cargo boxes. It has an easy 1/4 turn of key to lock and unlock for maximum security. The internal O-ring in lock body and its weather proof cap help seal out grime and corrosion. | Trimax Deluxe 7/8" Span Coupler Lever