DMT Dia-Sharp Diamond Knife Sharpener, Extra Fine 8-in - Precision

In this review the DMT Dia-Sharp diamond knife sharpener earns its place for anyone who seeks a refined finishing step after coarser stones. The single biggest reason to buy is its continuous extra-fine diamond surface that quickly polishes and refines edges to a razor-like finish without oils, making it especially useful for cooks, woodworkers, and tool users who need consistent results. The plate is practical in size and easy to use, and the extra-fine micronized diamond surface delivers repeatable sharpness with minimal fuss.

Key Features

• Extra-fine diamond surface: The 9 micron / 1200 mesh continuous diamond plate polishes edges to a refined, razor-ready finish after using coarser stones.
• Versatile size: The 8-in plate accommodates large kitchen knives and smaller pointed tools, so it works across most household and workshop blades.
• Dry or wet sharpening: The diamond surface sharpens effectively with water or dry, removing the need for messy oils and simplifying cleanup.
• Stable use: Four non-skid rubber feet keep the bench stone steady during sharpening, improving control and safety.
• Durable craftsmanship: Manufactured in the USA with a continuous diamond layer designed to resist hollowing or grooving for long-term cutting efficiency.

Who It's For

The DMT Dia-Sharp extra-fine stone is best for home cooks, professional chefs, and craftsmen who already use coarser stones or diamond plates and need a final polishing step to achieve a keen, durable edge. It is also useful for anyone who prefers a low-maintenance abrasive that works dry or with water and fits on a bench or countertop.

Those who should look elsewhere are beginners expecting an all-in-one system; this 1200 mesh plate is a finishing stone and is most effective after initial grinding with coarser abrasives. Buyers seeking a very large surface or powered sharpening system may prefer a different setup.

Pros & Cons

Pros

• Consistently produces a polished, razor-sharp edge due to the continuous extra-fine diamond surface.
• Works dry or with water, making maintenance straightforward and mess-free.
• Stable operation with non-skid rubber feet and a compact 8-in size that fits most benches.
• Pride of manufacture in the USA contributes to durable construction and long service life.

Cons

• As a finishing stone at 9 micron / 1200 mesh, it is not intended to replace coarser stones for major edge repair.
• Some users report differences in perceived flatness or coarseness, so initial inspection is recommended.

Specifications

Brand	DMT (Diamond Machining Technology)
Grit / Mesh	Extra-fine, 9 micron / 1200 mesh
Length	8 in
Surface	Continuous extra-fine diamond plate
Use	Dry or with water; finishing/polishing stone
Stability	4 non-skid rubber feet
Made in	USA

Our Verdict

For anyone who sharpens with a progression of abrasives, the DMT Dia-Sharp extra-fine 8-in stone is a reliable finishing option that delivers polished, durable edges with minimal maintenance. It represents good value for cooks and tradespeople who need consistent, repeatable results, provided they pair it with coarser stones for major reprofiling.

Frequently Asked Questions

Can this stone be used with water?
Yes, the DMT Dia-Sharp works well dry or with water; no oils are required.

Is this plate suitable for restoring a very dull or damaged edge?
No, this 9 micron / 1200 mesh extra-fine plate is intended as a finishing stone after coarser abrasives have repaired the edge.

Will the surface hollow or groove over time?
The continuous diamond layer is designed to resist hollowing and grooving, though users should inspect flatness periodically.