Continuity Tester Klein Tools 69133 Quickly reveals shorts or broken circuits in all types of electrical devices and controls Tests for continuity of circuit with power off Bulb in handle glows when circuit is complete (bulb included) Pointed 3-3/4-Inch (95 mm) probe gets right to the problem Deluxe 4-Inch (102 mm) long handle with removable nylon cap holds replaceable bulb and battery