DMT Diafold Serrated Diamond Knife Sharpener, Fine 4" — tapered conical tip for serrations & gut hooks, portable folding design

The DMT Diafold Serrated Diamond Knife Sharpener (Fine, 4") is a compact, folding diamond tool that sharpens serrations, hones gut hooks, and polishes tight curves for razor-sharp edges.

This lightweight, made-in-USA sharpener combines a tapered conical diamond plate and protective folding handles to deliver fast, reliable edge maintenance for chefs, outdoorspeople, and hobbyists. Its fine 25-micron (600 mesh) diamond surface removes metal quickly while leaving a refined cutting bevel, and its folded design stores safely in a drawer or pack. Use it dry or with water—no oil required—and you get consistent results across serrated blades, small scallops, and other hard-to-reach geometries.

How does the Diafold handle different serration sizes?

The 4" conical diamond face tapers from roughly 1/4" to 1/16", so you can match the diamond profile to most common serration radii. Work the cone into each scallop with light, controlled strokes to restore the burr-free cutting edge.

• 4" cone covers a wide range of serrations and small scallops
• Fine 25-micron diamond leaves a sharp yet polished finish
• Use short strokes to preserve serration geometry
• Effective on narrow or irregular scallops and micro-serrations

Can it sharpen straight edges and gut hooks too?

Yes—beyond serrations the Diafold functions as a miniature honing steel and conical file. The tapered shape and diamond surface let you touch up straight bevels, dress re-entrant points like gut hooks, and remove small nicks without reshaping the entire blade.

• Hones straight edges for fine slicing performance
• Restores gut hooks and re-entrant profiles safely
• Removes burrs and small dings quickly with minimal metal removal
• Fine grit maintains a keen edge without aggressive stock removal

How portable and durable is this folding sharpener?

The Diafold’s folding plastic handles protect the diamond plate when closed and create a compact 5" package for travel or storage. DMT’s monocrystalline diamond surface is bonded for long life, giving years of steady performance for frequent field or kitchen use.

• Opens to about 9.5" for comfortable working reach
• Closes to 5" for easy transport in gear bags or drawers
• Rust-free diamond surface works dry or with water—no oil needed
• Built in the USA for consistent manufacturing quality

What technique produces the best results?

Use gentle, consistent strokes that follow the curvature of each serration or the gut hook. Light pressure and short passes avoid over-grinding; check progress frequently and stop when the edge bites cleanly.

• Match cone diameter to serration scallop for full-contact passes
• Move with the cutting direction and maintain a steady angle
• Use water to flush metal particles if desired, then dry fully before storage
• Finish with a few light strokes on the opposite side to remove burrs

Who this tool is for: The DMT Diafold Serrated Sharpener is ideal for anyone who needs a small, reliable way to maintain serrated knives and tight profiles—professional chefs who work with scalloped blades, outdoors enthusiasts who carry serrated tools, woodworkers and tradespeople who need precise touch-ups, and home cooks who prefer to keep knives performing between full sharpenings. If you want a portable, fast-acting diamond sharpener that protects the diamond surface when not in use and delivers consistent fine results, the Diafold is a practical choice.