Dimensions 26 cm Description Made of steel and coated with industrial diamonds, this knife sharpener resets the edge of a dull knife with precision. The fine surface makes these sharpeners suitable for Japanese knives as well. Note:  Japanese knives have a very thin edge, and it is therefore recommended that they be held against the sharpening steel at an angle of 10 degrees. German knives have a thicker edge and can be sharpened, held at an angle of about 20 degrees or so. Cleaning & Care Tips We recommend this item be hand-washed.