I've had this little knife sharpener for ages, and while it works like a charm, I'm wary of using it on my better knives. Does anyone know if this style of sharpener

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ZWILLING Gourmet 6.5-inch, Nakiri Knife

Adjustable Handheld Prices Ceramic and Alloy Metal Knife Sharpener, Introducing our Adjustable Handheld Ceramic and Alloy Metal Knife Sharpener,

Handheld Knife Sharpener - 4 in 1 With Adjustable Ceramic, Tungsten Steel, Diamond Rod & Scissor Sharpener Blades - Multi-function, Pocket-sized

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The Adjustable Angle Pull-Thru Knife Sharpener offers new innovative features never used on a manual knife sharpener and functional performance unmatched by standard edge maintenance products. This sharpener offers two stages of sharpening (COARSE and FINE) for all types of straight edge knives with a grind on both sides of the blade and a fixed-angle slot for sharpening serrated edge blades.

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