A cute keychain magnet that you can use to tell if the metal you are looking at is ferrous (Magnetic) or non-ferrous.

Extra Strength Neodymium Magnet lifts 1 1/4 lbf. Solid Steel.  Standard Strength
SIZE: 2 5/8″ X 1/4″ Hexagon Plastic
Standard Bead Steel Chain ATTACHED at no extra cost.
Colors: Fire Red, Royal Blue, Jet Black, Bright Green, DayGlo Orange, Yellow, Purple, & Pink