Boride Stone Set for Edge Pro

For Hapstone, TSProf and Edge Pro knife sharpeners (Edge Pro format)

$106.00 USD 📊 Grit Chart


Boride sharpening stones are used for sharpening knives on Edge Pro sharpeners. Boride offers a wide range of stones with different performance values and different rates of wear. Boride stones are made of aluminum oxide, with the exception of CS-HD series stones, which are made of silicon carbide. All Boride stones are 6 mm thick and are mounted on high-quality aluminum blanks. Stones that are 6 mm thick offer a longer life cycle than stock Edge Pro stones that are 3 mm thick and are becoming a community standard.


5 stones
RUBY 150
AM-K 220
T2 400
Golden Star 800
PC 1200
Aluminum Oxide
For medium and soft steels (up to 59 hRC)
Value Pack
4 stones, leather, diamond paste
Aluminum oxide 120
Aluminum oxide 320
Aluminum oxide 600
Aluminum oxide 1000
Cowhide leather
Diamond paste 0.5 micron
Aluminum Oxide
For medium and soft steels (up to 59 hRC)
5 stones
T2 150
T2 220
T2 400
T2 800
T2 1200
Aluminum Oxide
To be used with oil for high performance and low wear rate.
For Hard Steels
5 stones
CS-HD 150
CS-HD 220
CS-HD 400
CS-HD 800
CS-HD 1200
Silicon Carbide
For hard steels (60-65 hRC)


Each stone:

  • Product size: 160 x 25 x 9 mm
  • Working surface: 152 x 25 x 6 mm (6"x1"x1/4")
  • Weight: 80 g
  • Abrasive: Bonded Aluminium Oxide or Silicon Carbide
  • Extra materials: Aluminum Blank, 3M PSA

How to use

Boride stones should be used with one of these lubricants:

  • Water
  • Soapy water
  • Boride Bori-Lube
  • Water solution of dipropylene glycol
  • WD-40 (for experienced users only)
  • Refined olive oil (for experienced users only)
  • Oleic aсid (for experienced users only)

In case of using the water as lubricant, soak the stone in water for 1-2 minutes. In case of using the oil, put a small amount (1-2 drops) of honing oil on the stone’s surface and spread it evenly over the stone with a finger. If the stone absorbs the honing oil, use larger amount of oil.

Boride Stones may have the following minor defects:

  • Saw strokes on the work surface
  • Residues of lacquer
  • Small chips at the corners and along the edges (no larger than 1 mm)

All these defects will be eliminated during preparation of the stone. The majority of sharpening stones requires preparation, and Boride stones are no exception. Additional lapping can be performed by customer to improve sharpening quality. We recommend to use loose silicon carbide powder or diamond lapping plate.


  • What is the difference between Boride and stock Edge Pro stones?

    There is no difference. Edge Pro stones are Boride 150 x 25 x 3 mm (6" x 1" x ⅛") branded as Edge Pro. Boride offers a wide variety of series and sizes, while Edge Pro offers a limited assortment. We buy sharpening stones from Boride and mount the stones to blanks. That's exactly what Edge Pro company does. The difference is we keep the names of the original sharpening stones in the names of the finished products.

  • Can I use Boride stones and stock Edge Pro stones simultaneously?

    Yes, but you must use a thickness compensator because stock Edge Pro stones are 3 mm thick, while the Boride stones we offer are 6 mm thick. It's highly recommended to own a thickness compensator because the ability to use sharpening stones of different thicknesses allows for a high level of flexibility.

  • What if I buy Boride stones 3mm thick to keep all my collection uniform?

    This is possible but not recommended as a long-term solution. The 6 mm thickness is becoming a community standard for Edge Pro sharpening stones. If you keep your entire collection 3 mm thick, you will not be able to use many good stones. You will also have to purchase 3 mm stones more often than 6 mm stones due to their shorter life cycle.

  • 5 sharpening stones are too many for me. What should I buy?

    Consider buying Ruby 150, T2 400 and PC 1200. These 3 stones are the best Boride stones for sharpening knives.

  • Can I buy one CS-HD and use it to sharpen all my knives? If it's okay for hard steel, it should be even better for soft steel, right?

    No, we do not recommend this. CS-HD will wear extremely fast when used on soft steel, making CS-HD uneconomical for this kind of steel. If you own knives of both hard and soft steel, consider buying 2 sets of stones.

  • Can I buy a sharpening stone without a blank?

    We don't sell sharpening stones without blanks.

  • What are the pros and cons of 6 mm and 3 mm thicknesses for sharpening stones?

    All stones wear as they are used and thicker stones have longer life cycles as a result. However, it's easier to use thinner stones on Edge Pro sharpeners because of their lower weight. The 6 mm thickness offers a perfect balance between life cycle and weight, and has become the community standard for Edge Pro format sharpening stones When made of hard material, 3 mm stones are good as ultra-fine sharpening stones, for example alumina ceramic or natural stones.

About Boride

BORIDE Engineered Abrasives has developed and manufactured abrasive products for nearly 50 years. Precise process management, fact-based problem solving and extensive material science are important parts of Boride foundation. Stable, good quality, modern production techniques and good service make Boride one of the most attractive brands in the sharpening stone market. Boride stones were originally designed for the polishing of dies and molds, but are widely used to sharpen knives on Edge Pro Apex sharpeners.

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