Description:It can be used for rough grinding, medium grinding, fine grinding, polishing, etc.Grinding Method:Immerse the oil stone in water for about 15 minutesPolish evenly in one direction with an angle of 10%~20%.Do not remove the powder when polishing the tool, which helps to sharpen the toolClean the surface of the oil stone with a soft brush and put it in a ventilated room to dryNotes:This stone can be sharpened with water or sharpening oil.Take care to protect the oil stone during use and avoid falling from high places.