Heavy Duty Construction, large size tester body made with high quality ABS, heavy duty, shatter-proof, durable than normal test light. 6-24v Widely Use Circuit Tester,designed to check vehicles electrical circuits, automotive battery, circuit integrity and other 6-24 volt wiring and circuits. Made with sharp super hard steel probe for piercing wires, also for hard to reach areas. Portable 135 inch long enough PU spring wire cord and large size alligator clip for easy and one hand operation. Strictly tested long service life test light bulb, including 1 pcs replacement conductive spring& bulb set to make it serve you faithfully for years. 7*24 Hours customer satisfaction service. Any questions, feel free let me know.