No, toothed, I also agree that the linear lock on lum tanto folder is well made. I had one for a year and there's not a single failure of the lock. However, I expect a stronger version because of its tanto blade. The thick blade and the "apple seed" grind on the front end of the blade make the blade capable for heavy duty penetrations. I just feel that such blade should have a better lock or at least a thicker linear. The lock seems to be the only reason making it a normal EDC instead of a heavy duty working/defensive knife.