Meterk Blue Magnetic Pole Pen Polarity Tester N/S Pole Identify Tool North & South Magnetic Pole Identifier
Meterk
Magnetic Pole Pen Polarity Tester N/S Pole Identify Tool North & South Magnetic Pole Identifier blue.Features: A professional tester for identifying the polarity of magnetic field fastly and safely. Pen type magnetic tester, mini and portable. One button operation, easy to use. The north and south polarity can be distinguished by the two signal lamps(red = N pole, green = S pole). Comes with a sturdy plastic tool case. It can be used for the determination and identification of permanent and elec
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