Set of boride stones (5 stones, 120-1000 grit)

Here you get a set consisting of 5 different grain sizes. 120-220-400-600-1000 grit The manufacturer is Grinderman in Russia. The stones are at least equivalent to the American boride stones. Just a third cheaper. I got hold of 10 sets at a reasonable price and am passing them on at a top price.   For all knives that are not necessarily sharpened with CBN stones (it always depends on the steel), these stones are a great alternative.