If you are a clencher these bits are fantastic. They fit all my pipes superbly and I think they will last. Don't bother with Chinese bits sold on Amazon or E-Bay as they are useless and don't last and they don't fit properly after a couple of uses. I am using one now on my Peterson P-Lip and I don't have to worry about them slipping off. These are well worth the money and I would definitely buy again. Seem built to last.
