I decided to use these on some of my tools and it was perfect for my situation. It feels great & just overall high quality!
Like I didn't have to put tape on threads, much easier and no air leaks
Works with the connectors I have. Saves possible damage due to stress on tool.
Great thing to have for air tools
No leaks around the ball joint, however the movement range is less than I hoped for. It didn't look like it would be much from the start and it seems to be even less. it worked for my immediate needs, but I am going to shop around for a full swivel connector. I am giving 5 stars because its well made and might suit others better.