Moves like a 3-D compass needle!

This gimbal-mounted bar magnet is an easily manipulated, high-sensitivity indicator for studying three-dimensional magnetic force fields. Quicker, easier, and more accurate than plotting with compasses or iron filings, it's ideal for experiments on magnetic induction, forces between poles, fields around wire and coils, properties of fields produced by electric current, and much more. This product is designed for work with magnetic fields in a school laboratory. Includes instructions.