Diamond Steel vs Honing Steel: Which One Do You Need?

Quick answer

Choose a honing steel for routine maintenance when your knife still cuts cleanly but feels slightly less keen, and choose a diamond steel when the edge is genuinely dull and needs a fresh sharpened edge. Many home cooks keep both: the diamond steel restores the edge, and the honing steel keeps it aligned between sharpenings.

What each tool actually does to the edge

A honing steel realigns the thin edge of a knife that has rolled or bent slightly during normal cutting. It does not remove a meaningful amount of steel, so it preserves the blade but cannot rescue an edge that has worn away.

A diamond steel is a sharpening tool. Its diamond-coated rod removes a tiny amount of metal to cut a fresh edge, which is why WÜSTHOF recommends pairing it with a honing steel rather than using it as the only maintenance tool.

The trade-off: speed versus steel removal

The diamond steel is faster at restoring a dull knife and needs less technique than a whetstone, but every use takes a little metal off the blade. Used too often on a knife that only needed realigning, it shortens the blade's working life.

The honing steel is gentler and ideal for frequent touch-ups, but it will not sharpen a truly dull edge. If your knife still slides on a tomato after several honing passes, the edge needs the diamond steel or a proper sharpening session.

Grit and finish: what to expect from a diamond steel

The WÜSTHOF 9" Diamond Knife Sharpener has a normal grit and a diamond pattern shaped to produce a smooth, sharp edge. That makes it a practical middle ground for home kitchens: aggressive enough to refresh a dull blade, but not so coarse that it leaves a rough, toothy edge.

If you are comparing fine versus extra-fine steels, remember that finer grits refine an already sharp edge rather than restore a dull one. For most home cooks, a normal-grit diamond steel plus a honing steel covers both jobs without adding a third tool.

When a honing steel alone is enough

If your knife still slices cleanly but drags slightly, a few light passes on a honing steel will usually bring the edge back. This is the everyday maintenance step that keeps a good knife working longer between sharpenings.

The WÜSTHOF Classic Ikon 9" Honing Steel is designed for exactly this routine. Its job is realigning the edge, not removing metal, so it is the safer default for frequent use on quality knives.

How to choose between a diamond steel and a honing steel

• If the knife still cuts cleanly but feels less keen: Use a honing steel. A few light passes realign the edge without removing metal, which is the right move for routine maintenance. Hone first before reaching for a sharpener.
• If the knife is genuinely dull or moderately sharp: Use a diamond steel to restore the edge. Its diamond grit removes a tiny amount of metal to create a smooth, sharp edge. Reserve the diamond steel for when honing no longer works.
• If you want one simple routine: Keep both: hone regularly with a honing steel, and use the diamond steel only when the edge needs refreshing. This limits metal removal while keeping the knife sharp. Pairing the two tools extends the life of the blade.

Product facts

• 9" Diamond Knife Sharpener: Diamond-coated rod with a normal grit, intended for dull or moderately sharp knives. Use it when the edge has actually dulled; it cuts a fresh edge rather than just realigning it.

  

• Classic Ikon 9" Honing Steel: A 9-inch honing steel designed to keep knives sharp and safe through regular realigning. A practical everyday tool for home cooks who want to maintain an edge between sharpenings.

  

Who each tool fits

Best for

• Home cooks who want a gentle everyday maintenance tool for quality knives
• Anyone whose knife still cuts but needs realigning rather than sharpening

Not for

• Restoring a genuinely dull edge, which needs a sharpening tool like a diamond steel
• Replacing a whetstone for heavy sharpening or repairing damaged edges