Description: Material: Crafted from metal, this lock cores and key replacement ensures durability and reliable performance in various weather conditions Product Dimensions: The lock cylinder measures 35.7mm in length with a diameter of 16mm, while the rod diameter is 12.3mm, ensuring a greatly fit for your specific vehicle model Design: Specifically design for the 5501 model frame, this lock assembly offers tailored security that integrates seamlessly with your existing setup Compatibility: The lock cylinders greatly used for car roof rack, rooftop cargo carrier, car luggage rack crossbar, automotive cargo crossbar, etc Package Includes: This package includes two keys and four lock cylinders, providing a complete solution for securing your off-road vehicle's roof rack Specification: Material: Metal Size Chart: Lock Cylinder: 3.57cmx1.6cm/1.41inchx0.63inch 1.23cm/0.48inch   Package Includes: 4 Pieces Lock Cores 2 Pieces Keys Note: Please allow slightly errors due to manual measurement and different monitors.