Each set of Lock Cores come with two keys. Our lock cores are sold separately on select racks and work with all RockyMounts products. Each lock core is coded so you can easily and always have a matching set for easy access to your bike racks and your bike. NOTE: If specifying a lock core to match ones you already own, please ask your dealer. If ordering online, type the lock core four digit code (ex. E144) in the "Comments" field and checkout.