This is the first bad review I have ever written about Revain. These inserts just don't do the work of saying goodbye. They chip and dull very easily. I thought it was my setup so I checked and checked again. Same result no matter what I do. Switched to Iscar GTN-3 and everything worked as it should again. I'm all for saving money, but it didn't work in this case. Lesson learned. From now on, I'll stick to higher value bets, at least as a parting.