According to my experience, these accessories are a complete letdown .Despite their promise of enhancing THE milling experience, they did nothing of the sort. The cutting tools were subpar, and i found them to be low-quality and poorly manufactured. The one pro was that they were packaged nicely, but this hardly compensates for the disappointing product. I expected more from an industrial and scientific product, but unfortunately this one missed the mark entirely. Save yourself the trouble and invest your money elsewhere..