Specifications Package Included: 1 Steel Heavy Duty Cargo Door Lock and 2 keys(with a built in high security barrel lock). Material: Steel Colour:black Adjustment Range: 9inch - 18inch Weight: 4 lbs / 1.8 kg Package Content 1 x Heavy Duty Cargo Lock 2 x Keys 1 x rubber cover Secure Your Goods: Heavy Duty tubular pin, high-quality steel, strong durable and bolt cutter proof, secure the doors of different types of semi-trailers and shipping containers. installation Open View of the Cargo Door Lock ?Separate the two halves of the Cargo Door Lock aligning them so the lock mechanism and holes are both turn in the direction of face ?Install one half of the Cargo Door Lock on each doors' locking bar. Secured View of the Cargo Door Lock Slide the two halves together by inserting the smaller tube into the larger tube. Secure the Cargo Door Lock as tight as possible on both doors' locking arms and turn dials of the combination lock. Note: Minor adjustments may be made to align the locking pin and holes.