EdgeWorks Knife Studio Review: Cheefarcuut 400 Grit vs HK Knife Works 400 EH

EdgeWorks Knife Studio is a sharpening-focused YouTube channel that does exactly the kind of testing forum knife nerds care about: freehand work on real kitchen knives, microscope shots of the bevel, and honest commentary on how stones actually feel in use.

In this video, he pits the Cheefarcuut 400 grit sintered/vitrified diamond whetstone against the HK Knife Works 400 EH super vitrified diamond stone, using two identical Aogami 2 kitchen knives at 63 HRC. Both stones are full-thickness through-diamond stones with a thick abrasive layer and are flattened on the same Shapton cast-iron plate with 60-grit silicon carbide before the test, so the comparison is as fair as possible.

Review highlights

• Both stones: true vitrified diamond workhorses
  Both the Cheefarcuut 400 and the HK 400 EH are hard, fast-cutting, through-diamond stones meant for tougher steels. They stay flat, resist dishing, and can raise a full heel-to-tip burr on Aogami 2 at 63 HRC in a reasonable number of strokes.
  
  
• Cheefarcuut 400: hard, fast, and relatively smooth for “400 grit”
  The Cheefarcuut is described as a very hard vitrified/sintered diamond stone that cuts quickly but feels a bit smoother and quieter than the HK. The sound is more “chalky” than harsh, and the bevel under magnification shows an even, fairly fine scratch pattern for a nominal 400 grit – almost behaving like a slightly higher-grit stone while still setting a bevel efficiently.
  
  
• HK Knife Works 400 EH: louder, grindier, more overtly aggressive
  The HK 400 EH is a super vitrified diamond stone with a wider surface. On the stroke it feels louder and more “grindery”, grabbing the steel more aggressively. Under the microscope it shows a slightly deeper, more widely spaced scratch pattern and a very prominent burr compared with the Cheefarcuut, reinforcing the impression that it is the more overtly aggressive cutter at the same nominal grit.
  
  
• Edge results and deburring
  Both stones raise a complete burr quickly from heel to tip and can leave a very sharp, toothy 400-grit edge that is perfectly usable for work. The reviewer treats 400 as a starting point in a progression and uses a light pass on a Nano Hone resin-bonded diamond strop (50 μm / 3 μm) to knock off the burr without erasing the 400-grit scratch pattern, then confirms that the resulting edge slices paper cleanly.
  
  
• Performance vs. price and value
  In pure performance, the two stones are very close: both are fast, hard, and capable on harder steels. The HK feels more aggressive and noisy, while the Cheefarcuut feels smoother and leaves a somewhat finer-looking finish. Considering pricing and availability, the reviewer and many commenters see the Cheefarcuut 400 as a strong value and a very accessible entry point into vitrified diamond stones, with the HK 400 EH remaining a great but more expensive benchmark option.
  
  

Watch the full video

If you’d like to see the full sharpening session, microscope footage, and the reviewer’s detailed commentary, you can watch the complete comparison here:

Watch the full Cheefarcuut 400 vs HK Knife Works 400 EH comparison on YouTube »