I work on mopeds as a hobby. I bought these to replace the cheap ones on the fuel and vacuum lines. I just swap the old for the new as I cycle the lines on and off. They are easy to put on and take off with pliers and hold up better. I have a box of 50 and I think I used about half of the box. Not a single problem and not a single hose slipped off. Will definitely buy another box once I've used it all up.