This device checks live 6-24V, AC or DC circuits. Tests for shorts in automotive and truck electrical systems, motor field coils, radio and low-voltage circuits, ground circuit of all lamps, wiring, fuses, etc. Pointed 3-3/4'' (95 mm) probe makes checking easier. Perfect for checking live circuits rated 6 - 24 VAC or VDC. Tests low voltage circuits and ground circuit. 3-3/4-Inch pointed probe makes checking easier. 36'' (914 mm) test lead with alligator clip. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right.