Sage Kitchenware Best Professional Manual Knife Sharpener - Easy Use - Safe - All Knife Sizes - Straight or Ceramic Blades 3-Stage System - Kitchen and Portable 3-STAGE DESIGN. There are 3 stage sharpening systems for knives. Diamond grinding wheel is used for ceramic grinding in the daily life; Tungsten steel blade is used for coarse grinding of blunt knives; Aviation ceramic is used for fine grinding. Perfect for the regular maintenance of knives. ERGONOMIC DESIGNED HANDLE. Up to 5 inches long handle, keeping your hand safely away from the moving blade. Fingerprint grooves fit your fingers well and offer comfortable and tight grip. SLIP-RESISTANT BASE. EVA non-slip base and mesh pattern design mean your sharpener will not easily move and stay in place throughout sharpening process, avoiding accidental injury. HEALTHY AND DURABLE MATERIAL. Combination of ABS rubber and stainless steel ensures comfortable feel and no harm to your knives, while product durability is also guaranteed. SAFE AND QUICK OPERATION. Only 3 to 4 pulls through the sharpener is all it takes to restore your knife to a precision edge.