Good tester
This tester is available from other manufacturers and they all appear identical except for colour. Rapids Voltcraft version was the best price I could find. The tester works as advertised with a couple of limitations- You can only test the less common mini ( standard ) relays where the 86 and 30 terminals are swopped over with the aid of a fabricated test lead. You cannot test normally closed micro 4 pin relays at all.