Best Knife Sharpener, Sharpening, Blade Sharpening, Kitchen Knife Sharpener, Pocket Knife Sharpener, Cutlery, Sharpener PROMOTION: Buy 2 knife sharpener and get $2.98 (21,5%) off. This is currently one of the best knife sharpeners on the market. Small but powerfull knife sharpener. Sharpens ALL knives. Suction cup does not slip. Attaches to all flat and clean surface.