What grit is this stone?

As a disclaimer, I do proclaim this to be absolute. What I understood was that the stone, as it is ceramic is measured in microns. This stone I saw advertised as 3 micron which converts to 8,000 grit. I have included a link to share with you the conversion table. https://www.gessweincanada.com/category-s/11328.htm

How does this stone compare to Black Arkansas stone ?

I suspect it is as fine or finer than a hard Arkansas stone. I love mine. I still use a leather strop for the final honing which is probably overkill based on how fine the spider stone is.

Will this stone work on my Japanese knives at 62 rockwell?

I use this for my straight razor

So, I see some say it isn't perfectly flat and they use different methods coarse DMT, etc. to flatten it, so won't that "rough" it up too much?

I had the same concern as you so did not use a dmt diamond to grind the ceramic flat. The many tiny hills and valleys on the ceramic surface are very apparent after sharpening a knife because the tops of the hills get dirty but the valleys do not. But even without being perfectly flat the ceramic works well. It would be nice to do a side by side test to see if flattening the ceramic gives a sharper edge or not.

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Spyderco Bench Stone Smart Knife Sharpener Outdoor Knife Sharpener & Stone Knife Sharpener with Leather Case (White), 20.3 x 0.5 x 5.1 cm ; 476 g

Product ID: 49568383

Details

Brand
Spyderco
Colour
White
Global Trade Identification Number
Grit type
Ultra Fine
Item weight
1.18 Pounds
Manufacturer
Spyderco

👜Leather case doubles as non-slip base

🪨Ultra-fine alumina ceramic stone

🪶Lightweight & handheld design

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Description

🪓 Sharpen like a pro, wherever you go — don’t let dull edges hold you back!

CRAFTED IN THE USA - Premium synthetic sapphire ceramic stone, built to last with trusted American craftsmanship.
SLIP FREE STABILITY - Innovative leather case doubles as a non-slip base for safe, stable tabletop sharpening sessions.
PORTABLE ERGONOMIC - Slim, lightweight design fits comfortably in hand for effortless sharpening on the go.
PRECISION EDGE REFINEMENT - Ultra-fine grit polishes blades to razor-sharp perfection for unmatched cutting performance.
VERSATILE SHARPENING POWER - Extra-large ceramic surface sharpens everything from knives to woodworking tools and even ski edges.

The Spyderco Ultra Fine Bench Stone is a premium, ultra-fine alumina ceramic sharpener designed for professionals and enthusiasts alike. Measuring 20.3 x 0.5 x 5.1 cm and weighing just 476g, it offers a large sharpening surface ideal for knives, woodworking tools, and even ski edges. Made in the USA with synthetic sapphire particles, it requires no lubricants and comes with a leather case that doubles as a non-slip base, combining portability with stability for precision sharpening anytime, anywhere.

Specifications

ASIN	B000Z0RW1A
Brand Name	Spyderco
Colour	White
Customer Reviews	4.6 4.6 out of 5 stars (100)
Global Trade Identification Number	00716104640447
Grit Type	Ultra Fine
Item Dimensions L x W x H	20.3L x 0.5W x 5.1H centimetres
Item Type Name	Spyderco Ultra Fine Bench Stone with Leather Case - White
Item Weight	1.18 Pounds
Manufacturer	Spyderco
Manufacturer Part Number	306UF
Manufacturer Warranty Description	Manufacturer's warranty.
Material Type	Stone
Model Number	306UF
Number of Items	1
UPC	716104640447 000000120609

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1802 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Romania.

Secure transaction

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