Almost mentioned diamond mini rifflers which I use a lot for tons of stuff, but really hard to tell the grit from pics.
Got 2 almost useless sets that are too rough for most work.
1 set that was perfect, the plastic case has disintegrated and I have no idea who made them, so couldn't recommend a brand.
Diamond rifflers are great for tons of stuff if you can buy them when you have your fingernail there to test grit.
Mainly use sintered "flame" tips in the Gesswein, or for custom shapes Birch dowels sanded to shape and the pressed FIRMLY into wood with appropriate grit Corundum or Diamond powder for stone/metal work.
scott
scott P.
2013 Desktop/spindle/VCP 11.5**
Maine