S&G TOOL AID CORP. has for over 40 years supplied the automotive, heavy duty, electronics, agriculture, marine and related industries with a wide range of general tools, equipment and mechanics’ aids. Our products are innovative and manufactured to professional quality standards. Key Features: Features a 90° boot and longer wire for easy installation and removal. Use to quickly troubleshoot ignition systems with "hands free" operation. Shows a duplicate view of the ignition spark. Technician can visually check 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