PACLOCK’s UCS-84A-WHT is engineered specifically for your roll-up truck doors from Whiting. It is the only one-piece high security solution that protects and defends the most critical point of your roll up truck door’s latching system—the hook. If the hook cannot be moved, then the door cannot be opened. A bolt on hasp is included. When locked, the orientation of the key positioning makes picking or drill the cylinder virtually impossible. There are two versions of this product ~ one for a Todco and one for a Whiting door handle. The UCS-84A-WHT is machined in the U.S. from 6061 aircraft-grade aluminum. All brass, aluminum, and stainless steel components render the lock rustproof. 6-Pin technology (more than the industry standard 4 pins) provides over 20,000 unique key codes and makes duplicate key combinations extremely rare, meaning that your key number is virtually unique to you. Stainless steel spool and serrated security pins make the lock pick, bump, and drill resistant. Includes the PAC-BAND, a field-replaceable silicone cover to protect the cylinder from the elements. CNC machined for U.S. precision and reliability, the lock body exceeds +/-0.003” tolerances for repeatable quality.