This handy tool provides an instant, zero-delay magnetic pole indication. Just press the push button to activate the tool, and the tester will use LEDs to instantly indicate the appropriate magnetic pole. The green LED light indicates the south pole, and the red LED light indicates the north pole. Due to the small distance between the probe and the item being tested, reliable indications are obtained even with closely spaced pole centers. A magnet’s neutral zone can likewise be precisely identified. This tool is the size and shape of a regular pen, making it highly portable.