Fine Diamonds | Red Ring

Fine diamonds — red ring — for finishing, margin refinement, and controlled surface improvement after preparation. Every diamond in this collection carries its grit and ring color directly in the product title, matched to ISO grit code 51x.

The red ring refines what coarse grits created: smoother margins, cleaner line angles, surfaces ready for extra-fine or polish. Busch codes fine figures with an 8-prefix (8856 = fine 856).

FAQ

What does the red ring indicate? Fine grit under the standardized diamond color-coding system — see the color guide linked below for the full ladder.

When do I switch to the red ring? After bulk preparation — use the same figure in fine to refine margins without changing your geometry.

Where are these diamonds made? Every instrument in this collection is manufactured by Busch & Co. in Engelskirchen, Germany — an ISO 13485-certified specialist in rotary precision instruments since 1905 — and ships fast from our US warehouse.

Reference resources: Bur Comparison Chart · Speed Chart · Color Coding & ISO Guide · Glossary