Synthetic Aoto Whetstone for Edge Pro

For Hapstone, TSProf and Edge Pro knife sharpeners (Edge Pro format)
$39.00 USD 📊 Grit Chart



Synthetic Aoto sharpening stones are used for fine sharpening knives on Hapstone and Edge Pro knife sharpeners. Synthetic Aoto stones are made of milled Aoto whetstone. Estimated grit for Aoto is approximately 2000-3000 JIS. All Synthetic Aoto are mounted on high quality aluminum blanks.

Aoto (青砥) Whetstone is mined in Kameoka, Kyoto in Japan.

Synthetic Aoto stones are universal, and can be used to sharpen knives of any steel.


  • Product size: 160 x 25 x 9 mm (6" x 1" x ⅓")
  • Working surface: 152 x 25 x 6 mm (6" x 1" x ¼")
  • Weight: 80 g (2.8 oz)
  • Abrasive: Silica stone
  • Extra materials: Aluminum Blank, 3M PSA

How to use

Synthetic Aoto stones should be used with one of these lubricant:

  • Water
  • Soapy water

Synthetic Aoto stones do not have any minor defects.

Synthetic Aoto stones do not require any preparations. It's preliminary lapped.

About Gritomatic

Gritomatic is not just an online shop. This private brand is a collection of high-quality, custom-made sharpening products. Gritomatic offers natural and synthetic stones, empty blanks and leather.

Product reviews

Questions and answers

If you have a question regarding this product, please feel free to ask.