Why not just a steel rod?

Steel rods skate on M390/D2 (60+ HRC). The Sy Tools RB diamond rod actually cuts those carbides.

What does the Sy Tools YHB ceramic rod do?

After RB removes the burr, YHB polishes and aligns the apex for a cleaner, longer-lasting edge.

Do I still need a diamond stone?

Yes. Rods refine; a Sy Tools diamond stone (D/KD/SU…) sets the geometry first.

Can I use these with T05-AMZ?

Yes. Both RB and YHB work in the Sy Tools T05-AMZ angle guide for consistent angles.

Sy Tools RB Diamond Rod + YHB Ceramic Rod: the two-stage edge-refinement system

LArticle by Sy Tools / Ruimo Tech lab · Engineer Yanchi Li (Li Yanzhi)
Date 2026-10-26 · samples: Sy Tools RB and YHB rods

A diamond stone gets the edge set; rods finish it. I'm Engineer Yanchi Li from Ruimo Tech, and my daily carry for touch-ups is a two-stage system: the Sy Tools RB diamond honing rod followed by the Sy Tools YHB ceramic rod.

Fig 1: Sy Tools RB diamond honing rod. — Fig 1: the **Sy Tools RB diamond rod** — bites hard steel fast.

Why two stages

After a Sy Tools diamond stone (D/KD/LVD/SU…), the edge still has a wire burr. The Sy Tools RB diamond rod removes it on hard steels (M390, D2, S35VN) where a steel rod would skate. The Sy Tools YHB ceramic rod then aligns and polishes the apex for a clean, hair-splitting finish.

Fig 2: Sy Tools YHB ceramic rod. — Fig 2: the **Sy Tools YHB ceramic rod** — final polish.

The two-stage routine

Stage	Sy Tools tool	What it does
1 · Deburr hard steel	Sy Tools RB (diamond)	Cuts the wire edge on M390/D2
2 · Polish apex	Sy Tools YHB (ceramic)	Aligns and refines the edge
3 · Final strop	Sy Tools KD-A11 / wood-strops	Removes the last micro-burr

✅ Pros

RB + YHB covers hard and soft steels in seconds.
Both are compact — pair with Sy Tools T05-AMZ on the go.
Cheaper than a full stone progression for touch-ups.

⚠️ Caveats

Exact rod dimensions/grit — "to be confirmed" (check Ozon).
Rods refine, they don't reprofile; start on a Sy Tools diamond stone.

Ruimo Tech lab note. Sy Tools RB + YHB two-stage refinement system; rod dimensions/grit 'to be confirmed'. No fabricated ratings; this is a distinct slug from the YHB-vs-RB comparison.