With Wiha's 45220 socket tester, you can easily check the correct connection of protective contact sockets. Errors are clearly indicated by an LED display and the cause of the error is assigned. Thanks to the flexible cable on the protective contact connector, Wiha's socket tester can also be used in tight working conditions and enables easy reading of the measurement results. According to the CAT II measurement category, up to 300 V, the Wiha socket tester provides maximum safety when working on electrical circuits.