About This CONTAINER & SEMI TRUCK DOOR LOCK:The NAKANEKO Cargo Protect Lock is suitable for vertical cargo door bars with gaps ranging from 9¾" to 16", and it fits onto all 10ft, 20ft, 40ft, 53ft, HQ, and Conex container locks, making it an ideal and secure solution for theft prevention and the protection of cargo property MAXIMUM SECURE & PROTECT:This heavy duty door lock mechanism is designed to secure containers and trucks by locking the innermost vertical locking bars together; Heavy-duty hardened steel, rust-resistant surface coating, anti-hammer lock protection against breaker bar attacks, and resistant to bolt cutter attacks; A Truly Effective And Sturdy Lock Deter Thieves INSTALLS IN SECONDS:Easy to install, it secures container or trailer locks within seconds without the need for additional tools or hardware NAKANEKO Cargo Trailer Door Locks can be installed on any semi-truck or freight truck with swing doors; These universal cargo door locks feature adjustable widths to fit various sizes of cargo trailers; Each lock is protected by a steel lock structure, ensuring security and reliability Overview Brand : NAKANEKO Lock Type : Pin Tumbler Material : Alloy Steel Recommended Uses For Product : Cargo Transportation, Storage Containers Style : Mechanical lock