General Tools AMY6 Magnetic Tester The General Tools and Instruments AMY6 Magnetic Tester is a tool that helps determine whether something is magnetic Our tool has useful application in finding North and South poles of magnetic fields The tester alerts you with two color LED indicators; red lights for north, green for south The tester comes with a practical pocket clip making it useful and portable in the field The tester runs on 4 LR44 batteries which are included with the instrument