https://www.lifttechoperator.com/roll-up-door-lock/ LiftTech is an automatic truck roll up door lock and opener. Box trucks with roll up doors won't be a target for theft like they used to. The Lift Tech opens and closes with one click. It is easy for drivers to use as they stop to make deliveries on their route. it can be retrofitted to your existing fleet of delivery Box Trucks with roll up doors or can be installed to new fleets of delivery trucks. The automatic close feature leaves no lock for a thief to cut. It locks just by closing so it is makes delivery easy and faster; protecting your inventory while making deliveires more efficient