Gardner Bender 30 In. Dual-Purpose Continuity TesterTesting for voltage to any eletrical project is important for your safety. This compact multi purpose unit makes it easy with a combination voltage probe and continuity tester built into a single unit with a convenient screwdriver tip designed for quick faceplate removal. Its compact size fits easily into a pocket or tool box for retrieval as needed. Use to test outlets, fuses, switches, electronics, extension cords, light fixtures and low voltage