Review on Complete Heat Shrink Wire Connector Kit For Marine And Automotive Use - TICONN Blue And Red 200PCS Insulated And Waterproof Terminals by Patrick Pearson

Well I didn't hang anything anything from these or yank the wires hard to test them. But I did give a pull on each side before applying the heat shrink and wires stayed on just fine. I used these to splice an oxygen sensor connector to the wiring from the pcm/harness side of my car. (I had managed to quickly fry my old sensor connector when I replaced the O2 sensor but didn't secure it away from the exhaust. Lesson learned.). Anyway, I used these to crimp the existing copper wiring to the copper wiring on a pigtail replacement connector. In my car, the PCM sends a bias/reference signal down to the O2 sensor. So when I checked for voltage coming from the PCM down the sensor signal wire to the end of the repaired/spliced connector I got 1.67V. I went ahead and checked the signal on my undamaged 02 sensor connector and got 1.61V. Suffice to say there was no detectable voltage drop using these to crimp copper wire to the copper barrel and back to the copper wire. (You might even say my repaired connector had even less resistance compared to the unrepaired connector!)