9” – 18” with tags and only one key The Shipping Container Lock is a heavy-duty steel trailer box lock designed for maximum security. Made of high-quality alloy steel, this black painted lock features a touch control method and a hand control controller type. With a mortise lock type and a rectangular shape, this lock is both durable and stylish. Weighing 4.12 pounds, this lock is a reliable choice for protecting your cargo and valuables.