The breakout leads are available with 4 different sizes of connectors: 0.6 mm, 1.5 mm, 2.3 mm and 2.8 mm.

They allow an oscilloscope to to connect to variety of  components in the engine compartment, without having to strip or pierce any insulation and with no risk of damage to connectors. Each lead has 6 blades wired to 6 sockets, allowing you to insert it between a plug and socket pair, other ends are 6 "banana" (4 mm) sockets.

With these 6-way leads, you will be able to test most of the sensors and actuators on all makes and models of vehicle, including MAP, temperature, throttle position and airflow sensors, fuel pumps, primary ignition circuits and fuel injectors.