DMT Dia-Sharp 8 in Coarse Diamond Bench Stone - Fast Edge Repair

In this review the DMT Dia-Sharp 8 in coarse diamond bench stone is judged as a practical, no-nonsense tool for anyone who needs to restore seriously dull or damaged edges quickly. Its continuous coarse diamond surface is the single biggest reason to buy: the 45 micron / 325 mesh monocrystalline diamond sharpens much faster than conventional stones, letting users remove nicks and re-establish bevels before moving to finer grits. The stone is aimed at cooks, woodworkers andshops that want dependable, repeatable results without oils or complicated setup.

Key Features

• Continuous coarse diamond: The 45 micron / 325 mesh surface cuts aggressively to repair chips and re-establish a working bevel quickly.
• 8 in practical size: The 8 in length accommodates large kitchen knives and longer woodworking blades for stable passes.
• No oil required: The monocrystalline diamond surface works dry or with water, eliminating messy oil and making cleanup easy.
• Non-skid base: Four rubber feet keep the bench stone steady during use for safer, more consistent sharpening strokes.
• Durable construction: The diamond coating and plate are built for long-term use so professionals can rely on repeatable performance.
• Made in the USA: Domestic manufacture ensures attention to flatness and quality control during production.

Who It's For

The DMT Dia-Sharp coarse bench stone is best for home cooks who maintain larger knives, hobbyist woodworkers who sharpen chisels and plane irons, and professionals who need a fast way to remove damage before refinement. It is ideal when a blade needs material removed quickly to restore geometry.

It is less useful as a standalone finishing stone for razors or ultra-fine edges, so users seeking a polished, shaving edge should plan to follow this coarse plate with finer diamond stones or strops to refine the burr.

Pros & Cons

Pros

• Aggressive, fast-cutting diamond surface that easily repairs dull or damaged edges.
• Works dry or with water, avoiding the need for oil and simplifying maintenance.
• Stable non-skid rubber feet and an 8 in length provide confident, controlled sharpening.
• Proudly made in the USA with durable construction for long service life.

Cons

• Coarse 325 mesh finish requires follow-up with finer stones for a refined or shaving edge.
• Some users report mixed experiences on absolute flatness, so those needing precision lapping should verify flatness before critical use.

Specifications

Brand	DMT (Diamond Machining Technology)
Model	Dia-Sharp coarse bench stone
Grit / Mesh	45 micron / 325 mesh (coarse)
Dimensions	8 in x 3 in x 0.38 in
Base	Non-skid rubber feet (4)
Use	Sharpen dry or with water; no oil required
Origin	Made in the USA

Our Verdict

The DMT Dia-Sharp 8 in coarse bench stone is a strong value for anyone who needs fast material removal and consistent results, from kitchen knives to chisels. It excels at repair and re-beveling, stands up to frequent use, and removes the hassle of oils; pairing it with finer stones will deliver a polished edge.

Frequently Asked Questions

Can this stone be used with water?
Yes, the diamond surface works dry or with water; water simply aids swarf removal and cleanup.

Will it leave a finished shaving edge?
Not by itself; the coarse 325 mesh surface is for repair and initial bevel work and should be followed by finer grits for a polished, shaving edge.

Is the stone stable during sharpening?
The plate ships with four non-skid rubber feet that provide a steady platform for controlled strokes.