Jewelry & Coin Tester: Uses magnetic testing to quickly help identify counterfeit or electroplated jewelry. Since counterfeit jewelry often contains steel or nickel, which are magnetic, it can assist in the preliminary identification of coins and jewelry.

Practical Magnetic Keychain: Compact, lightweight, and easy to carry. Easily fits in your pocket or wallet, making it convenient for testing iron, nickel, or cobalt anytime while helping reduce the chance of misplacing it.

Superior Quality Construction: Made with premium neodymium iron boron magnets and a high-quality electroplated protective coating for excellent wear and corrosion resistance. Built for long-lasting, reusable performance and suitable for jewelry dealers, metal recyclers, brokers, antique buyers, and collectors.

Wide Applications: Can also be used as a refrigerator magnet, whiteboard magnet, office magnet, craft magnet, DIY magnet, miniature model magnet, 3D printing project accessory, and for science, industrial, educational, jewelry-making, home decoration, fixation, salvage, and distinguishing stainless steel. Comes in attractive packaging suitable for gifting.