Paragraph 92. Chisels are sharpened in almost exactly the same way as plane blades. The length of the bevel of the chisel will depend on the kind of work which it is to do. For heavy mortising or work in hard wood, a chisel should not be ground too thin, or it will not stand the strain. For working soft wood it is very desirable that chisels be ground to a long, thin bevel. This makes it possible for them to cut very smoothly. The bevel should be formed on the grindstone or carborundum stone at a constant angle, as already explained. The wire edge should be removed and the final cutting edge produced on a fine whetstone, after which the chisel should be stropped on leather in the same manner as the plane blade.