Excellent tool. The cords are long enough for safe handling and the magnet on the back of the tool makes it even easier to work with. However, it can be dangerous to wait for the phase rotation to actually read when you don't know about it. When you connect the instrument for the first time, it will automatically read rotation a, b, c. This can be misleading. You have to wait and after the tool beeps, it will show the actual rotation.