Norton Non-Oil Combination Sharpening Stone 200 X 50 X 25mm 66253183006A premium silicon carbide abrasive gives fast stock removal for quick edge shaping with minimal loading. Benchstones are ideal for hand dimensioning and sharpening of all types of knives, plane blades, chisels, scrapers, or any other tool that needs a flat, sharp edge. Coarse Fine silicon carbide combination stone for sharpening and finishing. The use of oil with sharpening stones enhance the sharpening action and minimize the clogging of the stone's