Based on my experience with these industrial and scientific connectors they are incredibly durable and versatile .The green color makes them easy to spot in a sea of wires, and the whiskers make FOR a strong and secure connection. The pack of 500 ensures that I have plenty on hand for future projects. My only con is that they may be a bit pricey for smaller jobs, but their quality is definitely worth it. Overall, I highly recommend these connectors for any electrical project..