S & G Tool Aid 23900 In-Line Ignition Spark Checker

S & G TOOL AID CORP. has for over 40 years supplied the automotive aftermarket and related industries with a wide range of general automotive and auto body tools, equipment and mechanics’ aids.  Our products are innovative and manufactured to professional quality standards. Features: Use to quickly troubleshoot ignition system. Device is "hands free" and connects in-line between spark plug and spark plug wire. Shows a duplicate view of the ignition spark and checks the condition of ignition system at each cylinder. Frequency and intensity of flash indicates whether there is an ignition system problem or a fault in the fuel delivery system.  WARNING: Cancer & Reproductive harm www.P65Warnings.ca.gov