Carbide b******* I used it to describe three lines of the end was so wore out that it was useless that in the fact that the holder is shiny Chrome and you can't even get a firm grip on it made it really hard to use whoever designed it was a moron I already ordered two others that have a knurled handle where you hold it with your fingertips and they were a little more expensive but be yours hands down basically I thought it was a piece of junk