About This Item. 4-in-1 Knife Sharpening Innovative 4-slot knife sharpeners help restore your knives to new condition. Constructed from solid TP rubber (not cheap PVC) and features durable ceramic shank metal blade slots (to help keep blades shiny), tungsten steel (to easily remove burrs) and shank shank. diamond (to easily straighten damaged metal). And special scissor sharpening groove. ERGONOMIC DESIGN Diamond steel knife sharpener has a TPR base makes the kitchen knife sharpener stable and easy to hold throughout the sharpening process, fast accidental injuries. LOVVIY kitchen knife sharpener with ergonomic handle, right or left, best kitchen knife sharpener. Easy to use Small and easy to use manual sharpener. Simply place the blade in the sharpening notch and gently pull the knife through a few times, after a few seconds restore your foamed knives (lower the knives with some force, pull from its base to the tip, do not push back and more). Press and turn the rotary knob, you can adjust the angle of the sharpening slots to meet your different demands of different knives. Widely application Effectively use this ceramic knife sharpener for almost any type of blade smooth; use on most kitchen knives such as your chef& 39;s knife, slicer knife, utility knife, paring knife, utility knife, or other non-serrated blade; do not use with serrated blades or scissors.