The SR0065 is a pair of 5 lb. Test Probes. The SR0065 is designed to test Point-to-Point (RTT) and Point-to-Ground (RTG) Resistance in accordance with ESD standards. These probes can be used to make measurements on floors, mats, workbenches, garments, seating or any other flat surface where measurements of resistance between two points is required. These probes are ideal for use with any Surface Resistance Meter, which can use External Probes for measurement. The SR0065 can be used with the SRM110, SRM200, SRM310 and the SRM500 Surface Resistance Meters, among others.