Uxcell 150mm x 20mm x 5mm Sharpening Stones 200 Grit Corundum Whetstone with Base

Grinding Method: Immerse the oil stone in water for about 15 minutes Polish evenly in one direction with an angle of 10%20%. Do not remove the powder when polishing the tool which helps to sharpen the tool Clean 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.