The SNAP-ON TOOLS 6v & 12v CIRCUIT TESTER Model CT4F is a high-quality diagnostic tool designed for passenger vehicles. Made by Snap-On, a trusted brand in the industry, this circuit tester includes probes for easy and accurate testing. Manufactured in the United States, it features continuity testing capabilities, making it a valuable addition to any automotive tool collection. Ideal for professionals and hobbyists alike, this circuit tester ensures reliable results when troubleshooting electrical systems.