AanrAanraku Twofers JEWELRY Grinder Bits 220 Grit 
(2 bits per package)
 
- Use jewelry bits to grind a groove into the edges of jewelry for finishing and wire wrapping. A huge time saver and your jewelry pieces will be more durable.
- Fits most Glastar grinders
- Grinds a groove for 20 or 18 gauge wire.
- 1" diameter Grinding Bits with 2 Allen keys