YukaBa Envistia Mall 2X (2 PiecesKeychain Neodymium Magnet for Testing Brass, Gold, Silver, Ferrous Metals and Hanging Keys.

These keychain magnets offer strong neodymium magnet power in a handy keychain. They are perfect for jewelers, recyclers, coin dealers, or anyone that needs a convenient, easytocarry magnet to test for iron, nickel, or cobalt content. Featuring a durable neodymium magnet housed in a metal shell, it holds over 2. 5 pounds. Determine if jewelry is silver or gold plated by testing if ferrous metals are used as the base metal (excluding some nickel alloys. If a magnet responds to jewelry, it is not fine silver or anything near pure gold. The same is also true of brass and bronze antiques, many are just brass plating over steel or iron. The magnet can also be used to determine polished aluminum from stainless steel in most cases, and is very handy for testing industrial metals for recycling. Features a powerful N40 grade (2. 5 lbs pull strengthneodymium rare earth magnet encased in a plated brass housing for durability and comes with a stainless steel split ring. Product Specifications.