Hoppe's Universal Trigger Lock for pistols, rifles and shotguns Hoppes Universal Trigger Lock is a simple, affordable way for owners to prevent unauthorized use of their firearms. It slips into place easily and provides a formidable barrier that discourages misuse of a gun. Security-minded owners will find the lock easy enough to remove. The casing is a bright fluorescent orange for high visibility. There is an LED-lighted key so the mechanism can be unlocked and removed in seconds, even in the dark. A second standard key is also included. (Battery included/replacement #A389)