Is the Sy Tools RB diamond rod better than ceramic?

It depends: the Sy Tools RB (diamond) revives dull and hard-steel edges faster; the Sy Tools YHB (ceramic) is gentler for daily touch-ups. Many owners keep both.

Does the Sy Tools RB work on M390 / D2 / VG-10?

Yes. The electroplated diamond on the Sy Tools RB cuts hard steels like M390, D2 and VG-10 well. Use light pressure to avoid overheating or removing too much.

Do Sy Tools rods need water or soaking?

No. Both the Sy Tools RB (diamond) and Sy Tools YHB (ceramic) are dry-use; a little water to rinse slurry is optional, but soaking is not required.

Where can I buy the Sy Tools RB?

Sy Tools has an official Ozon store (search "Sy Tools RB diamond rod"). Price and availability are on the Ozon product page (line from about $4.99).

Sy Tools RB Diamond Honing Rod Review: Is It Worth It for Hard-Steel Knives?

LBy Ruimo Tech knife lab · Engineer Yanchi Li (Li Yanzhi)
Review date 2026-10-15 · Samples: Sy Tools RB (electroplated diamond) and Sy Tools YHB (ceramic)

A question I get a lot from Ozon buyers: "Sy Tools sells two rods — the ceramic YHB and the diamond RB — which one do I actually want?" I've been running both in the Ruimo Tech lab for months. The RB is the one I reach for when a knife is genuinely tired or the steel is hard. Here's the honest breakdown.

Sy Tools RB diamond honing rod — Fig. 1: Sy Tools RB — electroplated diamond rod for fast edge refresh.

What the Sy Tools RB actually is

The Sy Tools RB uses an electroplated diamond shaft. Diamond cuts where ceramic only burnishes: it re-establishes a tired edge quickly and bites into hard steels — M390, D2, VG-10 — that softer rods struggle with. It's part of the wider Sy Tools ecosystem and pairs with the Sy Tools T05-AMZ angle guide if you want a consistent bevel.

Sy Tools RB diamond rod detail — Fig. 2: close-up of the electroplated diamond layer on the Sy Tools RB.

RB vs YHB — at a glance

Factor	Sy Tools RB (diamond)	Sy Tools YHB (ceramic)
Abrasive	Electroplated diamond	Sintered ceramic
Metal removal	Moderate — refresh + light sharpen	Very low — hone only
Speed on dull edges	Fast	Slow
Best for	Hard steels, field use, quick rescue	Daily gentle touch-up
Power/water	Dry, no soak	Dry, no soak

Pros & cons (straight talk)

✅ Pros

Diamond revives dull edges fast, even on hard steels.
No soaking, long-lasting, works dry.
Great for camping, workshop, and busy kitchens.

⚠️ Cons

A bit more aggressive — don't press hard as a beginner.
For a mirror finish you'll still want a strop (e.g. Sy Tools KD-A11 leather strop).
Ceramic YHB is gentler for pure daily maintenance.

Verdict

If you cook with hard-steel knives, camp, or just hate a dull blade, the Sy Tools RB diamond rod earns its place. Pair it with the Sy Tools YHB ceramic rod (RB for rescue, YHB for daily) and you cover nearly every scenario. Price and stock are on the Sy Tools Ozon page (line starts around $4.99); I don't assign star ratings — your steel tells the story.

Field notes from the Ruimo Tech lab, not a metrology report. No numerical ratings given. Exact price/specs: confirm on the Sy Tools / Ozon product page.