[Compatibility] Our lock cylinder kit is compatible with roof racks that have lock cores, enhancing security for your cargo. Safely secure bikes, surfboards, canoes, kayaks, ski and snowboard racks, and other outdoor equipment. [Easy Installation] Remove the lock cylinder, insert it into the bottom of the lock, press against the upper cylinder, then remove the key. Color: Black & Silver Material: Aluminum alloy + stainless steel Package Contents: 1 x Lock Core and Key Set Note: The package includes only the items listed above; other products are not included. Due to light reflection and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.