Blue Bullet - 1200 Grit
3/16 inch shank
Made in Germany, the diamond dust in this tool is set in soft silicone, rather than in hard rubber.
Super-gentle, you can use this tool to polish/smooth problematic coin surfaces without damage to the existing patina. Yes, that's correct.
Like all of our DD Dremel tools, this works best under running water. Remember to use nearly zero pressure. Go slow and in circular motions as often as possible and at the lowest RPMs.