I used the 8mm, 2-connector version to connect COB LED strips from Home Depot. The original Home Depot kit came with a power supply, a lot of wire, including a Y-connector, but by itself was not adequate for a fairly small under-cabinet lighting project, because it didn't provide a way to make connections over short spaces. One issue I had was that I needed to put some of the lights on the bottom of an under-cabinet radio (remember those?), and with the original kit alone it was impossible to do that neatly. With these connectors I was able to cut the original strips *and* the wiring, and make new connections anywhere I needed them. I was even able to cut the pins off the end of the COB strips and insert the short stub with the pins into one of these connectors to make a new male or female pin connector on the end of a wire. The original 20 AWG wire also fitted into the connector, so I didn't need to use the wire that came with the kit - I have that for a future project. I had no problems making the connections - I used needle-nose pliers, so had to come in at an angle, but it probably would have been fine if I'd used a smallish pair of regular flat-end pliers. Every connection worked first time, and I had no damage. It took me a while to figure out which of the many kits available on Amazon was the right one for my project, but I'm very happy with this choice.
