These polishing discs consist of a thin 0.8 mm self-adhesive copper backing covered with diamond pellets covering half the disc’s total surface area.
This diamond arrangement improves sludge removal.

Other advantages over a steel diamond plate include
– water-resistant backing (no rust)
– excellent grit retention
– ease of storage
– lower cost

For use on a magnetic plate, the discs are identical, but glued to a metal disc.