This two-piece set of keychain magnets is constructed with neodymium rare earth elements and features an anti-rust coating for enhanced durability. Each magnet serves a dual purpose: functioning as a metal testing tool for brass, gold, silver and other metals, while also operating as a key holder. The anti-rust finish protects the magnets from moisture-related degradation, extending their useful life under normal conditions. The compact design ensures the keychains remain portable and convenient for everyday carry. The magnetic properties provide a reliable method for distinguishing ferrous metals from non-ferrous ones, with the strength of attraction indicating the type of material being tested. These keychains are suitable for hobbyists, professionals, and general users who require occasional metal verification capabilities alongside key organisation.
