Question 1

What is the grit rating?

Accepted Answer

According to Wusthof, they make two Ceramic Sharpeners, each with a different grit; obviously one is a bit more coarse than the other.   And like the Fahrenheit and Celsius scales for temperature, there are two corresponding scales of measurement systems for measuring grit.  This ceramic sharpener (model 4455) comes in the blue color, and is the more coarse of the two; it is rated at J800 (which is the same as F360).  The white one, model 4456, is the finer ceramic sharpener; it is rated at J3000 (which corresponds to F1000).  Even the white, finer grit, ceramic is more aggressive than the common honing Steel (they are usually called sharpening steels, but that is a misnomer) - so go easy with the white one and real easy with the blue one.  If you don't know what you're doing, read up first!  I believe I'd go with the white one unless you really know about sharpening knives, or your cheap knife is really dull (and even then, I'd then consider the diamond "encrusted" steel, which is a sharpener rather than a honing steel, and more aggressive than either of these ceramic sharpeners).

Question 2

Hi!  Does this sharpening/honing ceramic have a metal core, or is it ceramic-coated?  Thank you!

Accepted Answer

Solid ceramic as far as I know. Although I need to clean it regularly with a green scouring pads.

Question 3

How to clean to remove traces of metal that get trapped in the ceramic sharpener?

Accepted Answer

Most of the time a little soap and water with a brush will clean the ceramic sharpener just fine.  But every once in a while I have had to resort to a cleansing powder and brush to remove the metal.  I have used this same sharpener for years and it sure puts an edge on my knives.

Question 4

Does this last longer than a diamond steel of equivalent grit?

Accepted Answer

I use diamond steels & ceramic steels for different things. Ceramics are more fragile. My opinion I would say diamond steel will last longer.

ASIN	B0000DJYGT
Best Sellers Rank	#1,498,842 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #4,770 in Knife Sharpeners #27,109 in Kitchen Knives & Accessories
Brand	Wüsthof
Brand Name	Wüsthof
Color	Black
Customer Reviews	4.4 out of 5 stars 1,009 Reviews
Global Trade Identification Number	04002293445502
Grit Type	Light
Included Components	Honing Steel
Item Type Name	Honing Steel
Item Weight	0.22 kg
Manufacturer	Wusthof
Manufacturer Part Number	WT4455
Manufacturer Warranty Description	All Wusthof knives carry a lifetime warranty against manufactures defects
Material	Ceramic
Material Type	Ceramic
Model Number	4455
Number of Items	1

Wusthof 10" Ceramic Steel

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