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 ...

There’s no sense in carrying a knife if it’s not going to be as useful as possible. And a blade’s utility often comes down to its ability to cut. When ripping open a box, slicing that piece of rope, ...