Based on my experience these connectors are perfect for industrial and scientific wiring projects... The waterproof feature ensures top-notch safety for my installations while the shrink tubing makes the connections more reliable. The kit comes with various sizes and colors, making it convenient for me to differentiate and use them for different applications. The only con I found was that the instructions could be more detailed for first-time users. Nonetheless, overall an excellent product that I would highly recommend..