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
Bulb in handle glows when circuit is complete (bulb included)
Pointed 3-3/4-Inch (95 mm) probe makes checking easier
Deluxe 3.5-Inch (89 mm) long handle with nylon top holds replaceable bulb