This Geologist Tool is designed in the shape of a pencil with pocket clip and small magnet at tip. A spring wire clip is located at the middle. When the 'pencil' is held by this wire clip, it pivots on this center holder and the magnet at the tip is attracted to magnetic minerals present in a rock specimen that is brought into its proximity.
Note: Although this tool is named a 'pencil' it doesn't actually feature a pencil writing instrument. The name is solely derived from the shape and look of the tool.