Quality Material: This car rack system lock core set is made of metal material, which is strong and practical, not easy to deform, and has a longer service life Cross Bar Lock and Key: This lock kit allows you to replace the lock cylinder with 4x lock cores,2x keys,1x assembly key, enhancing the reliable of your racking system and cargo Great Replacement: This is a great replacement bar lock and key set that can directly replace old or damaged lock cylinders Easy to Install: The quality roof rack crossbar lock key kit is easy to install, you can install it directly in a few minutes, easy to use, saving your energy and time Widely Applicable: The practical crossbar lock is suitable for car roof racks, roof racks, car luggage rack crossbars, car cargo crossbars, etc Specification: Material:Metal Size Chart: 1.25cmx3.2cm/0.49inchx1.26inch Package Includes: 4x Lock Cores 2x Keys 1x Assembly Key Note: Please allow slightly errors due to manual measurement and different monitors.