This heavy-duty cargo container lock is designed to secure semi-trailer and shipping container doors with an adjustable 9.84"-17.32" locking range. Its steel construction and red powder-coated finish help resist bending, breakage, and corrosion during demanding use. The spring lock design offers convenient operation and added security. It installs without complicated setup and includes two keys for everyday use and backup. Ideal for containers, semi-trailers, warehouse doors, and construction site storage.