Conductive and overcoat pens are used to draw electrically conductive or insulating lines. Conductive pens contain conductive liquid silver applied from a precise pen. They are used for jumpers, repairs, shielding and are safe to use with common materials used in circuitry. Overcoat pens provide a durable, hard insulating coating. Like conductive pens, they can be drawn on wherever needed and protect previously drawn lines from moisture, corrosion and discharge.