The Master lock Cable Gun Lock is a must-have in firearm safety. Simply open the breach of your firearm and slide the end of the cable through to the magazine opening and lock. Stops unauthorized access to the firearm and disables the ability for a magazine to be loaded or a round inserted. The "Master Lock Co 14" Cable Gun Lock 99KADSPT" comes with a single lock and 2 keys. This key can only be used for this lock. Keys for separate locks, do not come identical. But you can have all of the locks keyed alike, if you take them into a locksmith or hardware store.