Norton Sharpening 25X50X150mm #109 Oil Filled Stone 66253183010A 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