The Jewelry Bench and associated tools are used to make jewelry. Because of the delicacy and sensitivity of the tools to contaminants, no ferrous metals may be used in this area, and none of the tools may be used outside of the Jewelry area.
To know the actual temperature of an oven as it relates to what the thermostat reads, to know if it is hotter or colder than it should be and how much to compensate in order to get precise results.