# Diamond Edge No.1 Knife Sharpener, 2-Stage, Tungsten Carbide

Source: https://www.ranked10.co.uk/kitchen/best-knife-sharpener/diamond-edge-no1
Ranked #4 in "Best Knife Sharpener 2026: The Grit Field Holds a Word": https://www.ranked10.co.uk/kitchen/best-knife-sharpener

- Price: £12.99 (checked on Amazon UK on 2026-09-12)
- Amazon rating: 4.4 from 10,515 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B09LZ7CBDS?tag=ranked10-21

The Diamond Edge No.1 costs £12.99 and is rated 4.4 stars from 10,515 ratings, and it weighs 70 grams.

It takes fourth because the sample is large and the form factor is the most convenient here, while its grit field names one grade for a two-stage cutter and its reviewers warn that it removes a lot of steel.

## Specification

| Field | Value |
|---|---|
| Grit as listed | Fine |
| Material | Tungsten carbide |
| Item weight | 70 g |
| Dimensions | 6.2 x 6.2 x 6.7 cm |
| Rating warning | Reviewers note it removes metal |
| Ratings | 4.4 from 10,515 |

## Questions people ask

**Will it damage my knife?**

It removes metal from the edge, which is what carbide does; a stone is gentler.

**How big is it?**

About 6cm across and 70g, so it lives in a drawer.

**What angle does it use?**

The bullet mentions a preset angle but does not name it.

**Does it work on serrated blades?**

The title says it is suitable for serrated and outdoor blades.

**Why is it fourth?**

Because it is the most convenient sharpener here, at the cost of a grit field that says nothing useful.

**How many ratings does it have?**

10515 at the time of collection, averaging 4.4 stars, with 66 per cent five-star and 4 per cent one-star.