Quick answer

For routine touch-ups, use the DMT Mini Sharp Fine with light pressure and a consistent angle to realign the edge. It is a portable, fine-grit diamond folding sharpener designed to refresh a working edge, not to repair chips or reset bevels.

When a fine diamond hone is the right call

The DMT Mini Sharp Fine uses 25 micron (600 mesh) diamond grit, which is fine enough to polish an edge without removing much steel. That makes it a good match for maintaining a knife that is already sharp but has lost its bite after light use. If your edge is visibly rolled, chipped, or dull enough to reflect light along the apex, a fine hone alone will take a long time to restore it. In that case, start with a coarser sharpener and finish with the fine grit.

Portable design and field limitations

The keychain attachment and lightweight build make the Mini Sharp Fine easy to carry, but the small surface area means you will work in short strokes. That is fine for touch-ups, but it is not a substitute for a bench stone when you need to remove significant material. Also, because the sharpener folds, you need a stable surface or a controlled grip to keep the angle consistent. Practice your motion before you rely on it in the field.

Step-by-step touch-up with the DMT Mini Sharp Fine

  1. Open and stabilize the sharpener: Unfold the Mini Sharp Fine and hold the base firmly on a flat, stable surface, or grip it securely if you are in the field. Keep the abrasive surface facing up and accessible. A wobbling base is the most common cause of inconsistent angles—check stability before you start.
  2. Set your angle: Match the existing bevel angle of your HFB knife. Most factory edges are between 15 and 20 degrees per side; use the same angle for touch-ups. You can use a marker on the edge to check contact. If you are unsure of the angle, err on the shallower side—removing too little is better than too much.
  3. Use light, consistent strokes: Place the edge on the diamond surface and push or pull with light pressure, covering the full edge from heel to tip. Use the same number of strokes on each side, alternating sides to keep the edge centered. Heavy pressure can round the edge or strip the diamond—let the abrasive do the work.
  4. Check the edge frequently: After a few passes, test the edge by slicing paper or checking for a burr with your fingernail. Stop as soon as the edge feels sticky-sharp and no burr remains. Over-sharpening on a fine hone can actually dull the edge by creating a burr—check often.
  5. Clean and store: Wipe the diamond surface with a damp cloth or rinse and dry it. Fold the sharpener closed and attach it to your keychain or store it in your kit. Diamond hones cut best when clean; a clogged surface will not refine the edge properly.

Product facts