Knives sharpening is made with Dick Multiron in a few seconds and your own handiness will decide which type of sharpening must be made. Sharpening effect with a decided pressure. Medium pressure to restore cutting- edge. Slight trimming with a light pressure The oval shape allows a higher contact surface to make a quick, easy and efficient sharpening. Optimum sharpening inclination 15-20 degrees. Flint length 30 cm.