American Eagle 1 oz. Silver Bullion Coin Counterfeit / Fake Detection CoinCheck Test Kit Easy 5 in 1 Test for 1 oz. Silver American Eagle Coins Pocket Size ~ Waterproof ~ Shatterproof ~ Durable (Tests over 1000 Eagles) Non-Abrasive / Non-Destructive Composite Material Constructed & Calibrated for Consistent Accuracy Intergrated Strong 'Rare Earth" Test Magnet