The principle of sharpening tools and cutlery is simple. Grind one or both sides of a blade so that the surfaces meet at an angle. But to do the job right, you need to know which angle is correct for ...

Tools lose their edge and become dull. That’s a fact of their existence. But it’s also a fact that they need not stay that way. Sharpening nearly anything, from a shovel to a putty knife to a plane to ...