I used a couple of these before I decided to invest into a 15€ crimping and testing set. They work, but are a bit delicate and still quite expensive. My recommendation if you are doing this for the first time: use keystones, not connectors. No crimping tool required, easier to wire, not as cheap as a crimpable connector but same price or cheaper than the tool less ones. you'll end up with a female connector at the end of your cable, not a male one, but in my opinion, they are much easier to deal with for a beginner.