I bought this along with their crimping tool: https://www.amazon.com/gp/product/B07TV3JLCK/ ref =ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1I regret this purchase: - It is very difficult to align the cables in the small part and there are no detailed instructions as there is a page for the smaller part. - Even if you manage to insert the cables in, they keep moving even if they are as straight as a metal rod. And to top it off, once you have everything perfectly aligned and in place, eventually the crimping tool will move them and they won't connect properly and oh yeah, you'll start over. The whole process will take me HOURS instead of several minutes as it should. So VCE, you have completely lost my confidence in your products. BTW I found another solution: CAT6 ends (through): https://www.amazon.com/gp/product/B07V4K9L14/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 Crimping tool (through): https://www .amazon.com/gp/product/B076MGPQZQ/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 You'll notice the transition from modular 2 piece to pass-through, you couldn't be happier I've already made 2 cables within 10 minutes and they work perfectly, first try, no problem. I recommend watching a step-by-step video on the crimping tool.