Gave an alternate cheapskate version. I can pull the cables out of the boxes to test them, there are only a few dozen in my house, and they're all labelled at both ends. I don't have $400 for that.@Baggsy
Your cuisrcuit finder is not necessary a toner/network tester.
But ..... I'll let the judge decide if it's a pass.
Was considering a homemade clear hose connected to a juice jug with a bicycle tube valve as a level for doing ceilings, but the laser is probably more common now.