Ceramic Knife SharpenerEspecially design for Ceramic Knife! Best results for Ceramic Knives, chef's knives, kitchen knives blade sharpening Knife Sharpener, Ceramic Blade Sharpening Diamond Features Double-sided diamond design for coarse sharpening and fine honing/polishing. Superfine diamond (1000 grit), best results for Ceramic Knife. Assembled knife case makes the sharpening angle and foce easier to control.