Alltrade 940580 Kit 73 Fuel Injection Test Noid Light Tool Set Tool set for checking the presence of on-off signals at electronic fuel injection components Noid lights flash when signal is present Includes 6 fuel injection test (noid) lights for various models of injector plugs Tool set for checking the presence of on-off signals at electronic fuel injection components Noid lights flash when signal is present Includes 6 fuel injection test (noid) lights for various models of injector plugs Storage case includes usage photos Kit 73 includes 6-Piece for checking the presence of on-off signals at electronic fuel injection components