Brass terminals.New stylish design.Superior quality.Revolutionary 3 step wiring body.On/off switch incorporated.Fits all standard 6 and 7 pin vehicle sockets. 54643/54647 have in-built LED circuit tester with simple colour coded wiring.Meets performance requirement AS4177.5 2004.Other Details: Part No. Pin Type Size Type 54621 6 Round Small Standard 54623 7 Round Small Standard 54643 7 Round Small LED Indicator 54647 7 Round Large LED Indicator