This combination whetstone is a well-designed sharpening stone brought to the same degree of perfection as the collection of Michel Bras knives. This biface whetstone combines two different grains, 1000 and 3000, in order to maintain the blade in perfect condition. By using first the rougher grain (1000) then the finer grain (3000) to sharpen your knife, you will preserve its fine cutting edge. The whetstone 3000 is made by joining a high-quality natural stone to an artificial stone using a special process that dispenses with binding agents.  A novel technique using thermal energy makes it possible to distribute grains evenly over its surface so that there is no risk of slippage or heating up when you sharpen your knives. The result is a whetstone that allows you to maintain your blade with ease and precision. It is the ideal companion of Michel Bras knives.