WORKS ON 12V GASOLINE ENGINES ,HIGH INTENSITY PREFOCUSED FLASHES CLEARLY SHOW ENGINES TIMING MARK. DOUBLE CHECK INDICATOR TESTS FOR INCORRECT HOOK UP OR FAULTY XENON TUBE UNIVERSAL SPARK PLUG ADAPTER INSTALLS IN SECONDS. HEAVY DUTY METAL CLIPS ARE EASE TO USE , STORE AND REPLACE REPLACEABLE XENON FLASH TUBE
