Flex. Diamond Engraver
With three diamond tips (point, ball, and cutting) and four ceramic grinding/polishing tips, there is not much that you can't do with this tool. It will mark virtually anything. Uses standard 115 V current to drive its super high speed motor. Only minimal pressure is required. Bright LED work light at base of tip delivers plenty of illumination right where it's needed. And best of all, for its features, it's still very inexpensive.