Includes keychain magnet tester to quickly determine metallic composition-genuine silver and gold show minimal magnetic . Use the included measuring card to accurately check your coin's diameter against certified standards for authenticity verification. Designed for silver and gold coins, this kit combines resonance testing, magnetic composition checks, and precise size measurement for reliable multi-factor verification. Secure your coin in the included holder, release, and compare the clear resonance against authenticity standards-ideal for detecting with ease. design for easy carrying and on-the-go testing. Compatible with Precious Coin Tester, Pingcoin, and Coin Tester apps for advanced analysis., Manufacturer: PokFhgur