TRYMAG Keychain Magnets for Testing Brass, 4 Pack Neodymium Pocket Keychain with Strong Magnetic Rare Earth , Gold Silver Jewelry Test Magnet Hanging Keys Holder

【Product Size】: 0.47 x 1.69 inches; Package: 4 pack; Pull Power: 1 pounds. 【Small & Convenient】: The keychain magnet is very convenient and easy-to-carry to test for iron, nickel, or cobalt content, a must have for garage & estate sales! 【Strong Material】: The magnetic keychain is made of A3 steel shell + neodymium rare earth magnet. Strong wear resistance and corrosion resistance, can identify counterfeit/gold-plated jewelry, of which steel or nickel alloy is usually the basic material 【Multi Use Magnet】: Premium quality brass test magnet for jewelry dealers, metal recyclers, brokers, antique buyers and collectors! 【Customer Service】: Made under ISO 9001 Quality Systems. We are professional magnet seller, any question please contact us freely, we will try our best to solve your problem as soon as possible