Features: This portable coin tester set combines stainless steel and aluminum alloy construction with sensors for coin authenticity verification in jewelry and numismatic applications. Featuring easy assembly and broad spectrum compatibility, the portable analyzers detects various coin size through corrosions resistant metal housing while maintaining pocket ready portability. Ideal for jewelers verifying metal coin, collectors authenticating rare specimens, and dealers requiring verification during transactions or outdoor event. Perfectly suited for antique market evaluations, travel friendly treasure hunting expeditions, or quick quality checks in humid workshop environments. Engineered as sturdy coin verification tool, its sturdy materials withstand frequent field use while delivering museums levels accuracy across historic and modern currencies. Specifications: Materials: Stainless Steel, Alluminum Alloy Size: 12x3.8cm/4.72x1.49inch Package Includes: 1pc Pocket Coin Testers Set note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.