Taidea knife & tool sharpener Taidea knife & tool sharpener, adopts human technology design, with elegant and practical appearance, protection easy and effective, is widely available for the maintenance for all kinds of knives in different situations. The whetting part is made of high rigidity metal, will remove the knifef+s surface metal by steel scurf, easy to control when whetting, and then fast shape the dull blade. Instruction: To use, place knife on table or counter top with the cutting edge up. While holding the knife handle with one hand, hold the sharpener as shown with your fingers through the opening formed by the handle and the finger guard. Remember: the sharpener moves while the tool being sharpened remains stationery. Straddle the knifef+s cutting edge near the handle of the knife with the f¼vf¼ notch formed in the sharpener. With the head of the sharpener at about a 90fp angle to the knifef+s edge press down lightly using thumb pressure and draw the sharpener past the point of the blade. You will feel the tungsten carbide sharpeners removing metal from the knife. Remember: light pressure is sufficient. Heavy pressure might cause you to lose control of the knife and possibly cause injury. Ideally for 1maintenance of all kinds of family knives 2maintenance of knives in restaurant and public location 3maintenance of garden knives 4maintenance of fieldwork knives Note: 1put rhombus protuberant part on the v slot perpendicularly 2make an effort slightly to pull hereafter the knife till the blade sharper for find grinding 132*64*17mm