Quickly and easily test earth continuity of extension leads using any PAT tester.
Plug the extension lead into your PAT tester,... plug this tester into the other end... and clip your earth bond lead onto the earth terminal.
This device can also be used as a quick and easy functional check for your PAT tester, by plugging it into the PAT tester, attaching the earth bond clip and running an earth continuity/earth bond test (It should read near zero).
Easy to carry around in your pocket. Makes the job easier and faster. More accurate than using an IEC lead because the reading on the PAT tester is the impedance of the lead under test (no need to calculate and deduct the impedance of the IEC lead)