The Stanley 100-500V Spark Detecting Linesman Testers?ÿare?ÿunique and innovative tool built with industrial linesmen in mind. The spark detecting function ensures that the user can keep their work area safe while they work, which is particularly useful when they are working with live electrical wires. This tool has been designed to be used in the home or industrial settings, and it's also useful on car batteries. The Stanley 100-500V Spark Detecting Linesman Testers?ÿare ergonomically shaped to make it easier to hold, and the button is well placed for a right-handed person. The material used is high quality and durable, and it's been built for long term use. The handle of the tester is transparent so that you have an unobstructed view of the meter. It comes with a clip that you can use to attach it to your pocket or waistband when you're working on live electrical wires so that you don't have to worry about dropping and losing it. The Stanley 100-500V Spark Detecting Linesman Testers?ÿare?ÿmust-have for every electrician. It can detect voltage of up to 500 volts, while the internal tester will check insulation and continuity in seconds. This model features a molded handle that's longer and has a curved shape to provide greater comfort and control. The handle is also transparent so that you can easily see the internal tester. This model also has a tilt-head design, which allows you to hang it conveniently on your tool belt with the attached clip.