Multifunctional household stone $ 9.69 Features: adjustable grinding and running-in angles with integrated spring. Maintain the angle between 15 and 45 degrees when sharpening the knife. Can be used for sharpening, lapping Non-slip silicone pads at the bottom. Applicable to metal and serrated knives. Characteristics: Material: carbide, ABS, silica gel Size: as pictured Product included: 1 x kitchen knife sharpener