This I believe is not a pass-through connector?
Had actually ordered pass-through connectors with them (FEDUS), and was mistakenly sent these (the model with the ground prong). To their credit, they were quick to send the replacement, but the pass-through connectors do not have a ground prong (at least the ones they sell). So, anyone buying from them - it helps to double-check if the connectors have the ground prong and/or are pass-through.
Also, I had ordered a length of CAT7 while being aware that this is not a recognised standard (in the mistaken belief that CAT7 > CAT6A, which it generally is not). The CAT7 cables sold by them are fine for my purpose, but there are at least a couple of things that make it really hard to crimp:
1. The wires are stranded.
2. In CAT7 cables, each pair is shielded individually, and there is again another outer layer of shielding for all the pairs.
If still buying CAT7, use pass-through connectors to make things slightly more bearable.