These Burnish metal & give it a pre-polished look. The shank is included in this kit. Shank/mandrel diameter is 3/32″ (2.38 mm).
This is one of Anie’s favorite abrasives. Available in COARSE, MEDIUM, FINE, SOFT-FINE and VERY FINE variants.  I have chosen the FINE, SOFT-FINE and VERY FINE for metal clay.  If you would like the coarse, medium or fine, let me know and I can get them for you.

The NEW SOFT FINE grade has a more pronounced "sponge-like" effect and is slightly more conforming to dimpled/concave areas than the FINE. Both grades provide the same surface finish.

Jewelry applications: It’s excellent for “wiping off” or “blending in” scratches and scuff marks on precious metals. It is also great for removing porosity & parting lines in jewelry castings. It does not remove your precious material. Instead, it burnishes and spreads it along the surface. Simply follow up with the FELT wheel for a finished, polished look.