Grit numbers are a sequence, not a single choice · review
Two double-sided corundum stones covering four grits from 400 to 8000 — the full progression, including the coarse grit that repairs a chipped edge.
What we would actually buy The full progression at a low price. Use the 400 side only when you can see damage.
Two double-sided white corundum stones covering 400, 1000, 3000 and 8000 grit, with non-slip silicone mounts, to be soaked for 5 to 10 minutes before use.
400 repairs. 1000 sharpens. 3000 refines. 8000 polishes. That is the full ladder, and most kitchens use only the middle two.
Reaching for 400 because a knife feels blunt. Coarse grit is for visible damage; using it routinely shortens a blade by years.
A flattening plate. Stones dish in the middle as they are used, and a dished stone cannot produce a straight edge — the fault then looks like technique.
On sale at around $22 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on 3 September 2026. The live price is at the top of the page.
| Grits | 400/1000 and 3000/8000 — two double-sided stones |
|---|---|
| Material | White corundum |
| Preparation | Soak 5 to 10 minutes before use |
| Holder | Non-slip silicone mounts |
| Amazon reference | B09Z7RDYV2 |
| EAN | 0709414966642 |
A listing is not an offer: the reference exists on these stores, availability changes daily.
When there is a chip you can see, or a tip to rebuild. Not when a knife merely feels dull — coarse grit removes far more steel than the job needs, and a knife has a finite number of sharpenings in it.
Yes — the maker states 5 to 10 minutes. A dry water stone clogs with steel, stops cutting and forces the pressure that pushes an angle off.
7.5/ 10
The full progression at a low price. Use the 400 side only when you can see damage.
Close prices, same category: comparable cookware and knives. We keep only the specifications all of them publish, because a column with gaps compares nothing.
| Model | Price | Grits |
|---|---|---|
| wucgea 400/1000 + 3000/8000 set | $22 | 400/1000 and 3000/8000 — two double-sided stones |
| Amazon Basics 1000/6000 double-sided | $28 | 1000 on one side, 6000 on the other |
| DOWOX 3-sided diamond and ceramic, 400/1000/8000 | $39 | 400 diamond, 1000, 8000 |
| SHARPAL Diamond 325/1200 with storage base | $70 | 325 coarse (45 micron) and 1200 extra fine (12 micron) |
A kitchen with a chipped knife as well as dull ones.
Amazon reports what buyers took in the month before this page was last checked: at least 300.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for cookware and kitchen knives and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
Double-sided 1000/6000 grit · angle guide included · non-slip bamboo base
The combination stone that covers a home kitchen — 1000 to sharpen, 6000 to refine — with an angle guide and a bamboo base, at the lowest price here.
Best for: A first stone, for knives that are dull but undamaged.
≈ $28
Three sides · 400 diamond, 1000, 8000 ceramic · angle guide · no soaking
A three-sided block combining a diamond coarse face with ceramic finer faces — diamond cuts hard steel fast, and none of it needs soaking.
Best for: Hard Japanese blades, and anyone who will not soak a stone.
≈ $39
Two stones 17.8 × 5.6 × 2.8 cm (7 × 2.2 × 1.1 in) · four grits · bamboo base with rubber feet · FLATTENING STONE INCLUDED
The only stone set here that includes a flattening stone — the consumable nobody anticipates — with published dimensions and a bamboo base.
Best for: Someone who intends to keep sharpening for years rather than once.
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
