The CLM100 Digital Cable Length Meter is an excellent tool to measure spooled cable/ wire. This best seller is built solid and supplied with a ruggedized boot for reliable field performance. Currently being utilized by major utility companies, electrical contractors, wholesalers, and installers where quick and accurate inventory management or measurements are needed for job accountability. Simply attach the Kelvin Clips to both ends of the cable and adjust the indicator to the size wire being measured. A temperature compensation circuit ensures accuracy by compensating for the temperature of the wire.