NULTRUMA Equipment Lock Heavy Duty Cargo Door Lock – Powder Coated Steel Shipping Container & Semi Trailer Door Lock, Maximum Security Key Lock for Connex Box, Bolt Cutter Resistant Rust-Proof

["Universal Fit for Containers & Semi Trucks – Fits vertical cargo door bars spaced 9¾” to 16” apart (extension kit available). Works on sea containers, storage containers, over the road trucks, and semi trailers. No mounting required.","Maximum Security Construction – Heavy duty steel locking structure resists thousands of pounds of force. Powder coated finish, rust proof, and bolt cutter resistant. Anti tamper design locks the innermost vertical bars together.","Keyed Differently – High Security Barrel Lock – Each lock comes with 2 unique keys. No key codes kept on file, giving you controlled, exclusive access. Tamper resistant tubular pin tumbler design prevents picking and unauthorized entry.","Easy Installation & Operation – Separate halves, align so lock mechanism faces downward, slide the smaller tube into the larger tube, tighten against both locking arms, and depress the locking button with key removed. No tools needed.","Signature Red Finish & Quality Assured – Distinguished red powder coating is backed by multiple quality checks. Built to withstand harsh weather, salt spray, and daily abuse on job sites or highways."]