I don't use these connectors very often (I usually solder the connections) but they work quite well for 12v and low voltage cables. I have a 12v fan connected to the light wiring of an RV fridge. The fast connection worked great. I also tried the T-connector, but the spade connector wouldn't stick to the small 22ga. wire is very good. The red connector is really made for a larger wire like 18-20ga.