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. 100% satisfaction customer service.