Gritomatic - High precision knife sharpeners and sharpening supplies
  • Hapstone M2
It all starts with a knife. A knife that deserves respect and requires proper maintenance. Keep it sharp, the magazine articles say. But this can be a difficult and frustrating process. Old crafts are becoming less important, and tool sharpening skills are no exception. Our mission is to ensure this craftsmanship endures. The idea of knife sharpening being performed by the individual to whom the knife belongs is close to our heart. As such, the support we offer our customers includes information about sharpening stones, abrasives and knife maintenance. We provide modern, high-quality sharpeners that give a fast, long-lasting edge, as well as various stones and accessories. We have a great love for the craft of knife sharpening, and our aim is to share this passion with our customers.



Featured products

Wooden Storage Case for Edge Pro Stones


$57.00 USD

Custom-made wooden storage case holds and protects your Edge Pro stones. An elegant light-weight yet sturdy case is made of oak featuring high-quality hardware. The case has 5 slots for sharpening stones of Edge Pro format.

Fine-Tuning Adapter for Hapstone Knife Sharpener


$34.00 USD

Fine-Tuning Adapter is a simple tool for maintaining the chosen sharpening angle while working on Hapstone knife sharpener.


  • Material: Aluminum
  • Compatibility: Hapstone M2, Hapstone V7, Hapstone V6, Hapstone V5


Sneak peek: Suehiro Debado

December 16, 2018

Debado is a premium series from Suehiro made of aluminum oxide with the magnesia binder similar to Chosera and Shapton Pro series. The magnesia binder gives Debado excellent sharpening quality and performance, and high wear resistance. Debado series stones are universal and can be used to sharpen knives of any steel including high carbon, vanadium, and chromium steels.

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Sneak Peek: Venev OCB Bonded Diamonds

December 14, 2018

The OCB version of Venev Diamonds utilizes a brand-new yellow binder with no abrasive particles in the composition. OCB is available in extra-fine grits only and offers better scratch-free sharpening result.

Venev OCB Diamonds are available in F 1200 grit (2.5 um) only. F 800 grit (6 um) will be released in Q1. Dual-sided formats of OCB will be released at the same time.

  • I have the original Venev diamond stone 1200 grit. Do I need the OCB?

    Legacy binder composition includes medium-hard particles up to 7 microns large. (It was necessary to stabilize diamond/binder matrix.) As result, when sharpening some steels the legacy F 1200 and F 2000 may not show noticeable progression after F 800. In this case, the new OCB diamonds will be the good upgrade.

  • Do I need to lap OCB diamonds?

    We recommend lapping all Venev diamonds including OCB because flatness tolerance is the same as for legacy diamonds. However, it's not mandatory for OCB version because the surface is finer.

  • How about OCB F 2000 grit?

    It will not be released due to substantial technology limits. F 2000 will be legacy only.

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Sneak peek: Metallic Bonded Diamonds

December 13, 2018

New Metallic Bonded Diamonds are more wear-resistant and have better geometry "out of the box" than resin bond Venev diamonds. Metallic diamonds are available in 7 grits, the coarsest is 40 grit (500 microns).


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