The 360Pcs Heat Shrink Ring Wire Connectors,#10,1/4",5/16",3/8"(3 Colors/4 Sizes)12-10 16-14 22-16 Gauge Waterproof Automotive Marine Electrical Terminals Kit,Insulated Crimp Connector Assortment
are poor quality and the metal is too thin.
The rings are easy to bend and should be much harder to do so.
Using a crimper designed for heat shrink connectors, I crimped a red one onto an 18AWG wire and I was able to pull it off very easily. I tried a blue one and crimped it onto the wire using the spot that should be used for red and then it held OK, that's a huge red flag, the red spot on the crimper should be for the red terminals only.
The amount of metal to crimp on to the wire is very small and doesn't cover much and again is much too thin.
The heat shrink is very good, however.
I've included several photos of a comparison against what I consider a very good heat shrink ring terminal.
Picture 1: the ring on the top is the good one and the bottom is from this kit. The good terminal has a larger ring surface area but the inner diameter hole is the same as the one from the kit.
Picture 2: the ring on the right is the good one and the left is one from the kit, I hope you can see the difference in the length of the cylinder that crimps around the wire and that it is longer on the good terminal ensuring a good grip of the wire.
Picture 3: A closer view of the comparison. Again the good terminal is on the top.
Picture 4: A view of the wall thickness of the cylinder that crimps around the wire. The one on the right is good terminal and you can see its walls are much thicker than the one in the kit. This make a very good crimp and holds onto the wire extremely well.
I do not recommend these terminals for any application.