These are absolutely brilliant, so easy to put on......its just **** it in, tighten a little and you are done and ready to go. Takes a little bit more chalking the first time.......but what tip doesn't.....is great that there are 6 in the pack.....thought they wouldn't be any good as they are so inexpensive....but I couldn't have been more wrong about them........will definitely be buying again when I need more tips.