Multifunction Keychain Tester – Test Money, Gems, Minerals & Rocks

This little keychain tool is surprisingly handy.

It's a multifunction tester that claims to check money, gems, minerals, and rocks.

Made from metal and small enough to carry with your keys, it's a neat gadget for anyone into prospecting, collecting, or just wanting to check their cash.

It's unbranded and made in China, but if you need a portable, basic tester on the go, this is a cheap and simple option.

Brand new and ready to be your everyday carry sidekick for quick checks.