We are a tech business and I have used 100's of these. I wish they showed up more in the search on Amazon because they are great! I am lucky that I was able to find them the first time. The plastic dividers between the wires is reinforced so you are much less likely to bend them when punching down the wire (ask me how I know....). The keystone jack has fit into every keystone slot that I have tried them on. The cap clicks on and stays on well. It also has a rounded cable side so that it makes a nice fit for the network cable. I have used them for multiple types of CAT6 (and CAT5e cables if I was in a pinch) and it has never had an issue.I don't normally write reviews, but after going through many, many other keystone jacks, I wanted to help reassure anyone else looking for a good keystone jack out there.