The surfaces of sharpener is make of Metal materials, safe and enduring, not easy to craters and flatten Maintenance recommendations: after sharpening do remember to wash Cutter before cutting; In order to get nice result, use with water or honing oil; Do not put the sharpener in the dishwasher or submerges in water With fine resistance to abrasion and, it can apply with your confidence and easy to maintain Metal plate honing stone can apply to sharpening of household kitchen cutter, sharpening of wood chisels, seal, seal cutting tool and chamfering of glass tiles With the proper size and light in weight, to carry and store