I bought them for 23AWG Solid Copper CAT6A. The individual wires barely fit, but the wire grommet doesn't. I connected 24 AWG stranded CAT6A cable and they worked fine hence the three stars. This was my first "pass-through" style and I didn't find them any easier or faster than regular RJ45 connectors. I usually get 1 error in 100 non-end-to-end completions, so there is no improvement. Takes longer due to wire cleaning; Bought three "flush" crimping machines to test and none of them worked well, all required wire cleaning.