Paragraph 91. If your shop is not equipped with a grindstone, you will be able to get very satisfactory results by the use of a rather coarse carborundum stone. This is merely a whetstone with coarse grit which enables it to cut very rapidly. It should be used in the exact manner of the whetstone just explained. In purchasing a carborundum stone for the shop it is best to provide a stone which has coarse grit on one side and fine on the other. This makes it convenient to use the coarse side of the stone in cutting down and forming the desired bevel on a chisel or plane blade. The stone may then be turned over and the final whetting completed, as already explained.