A $450 serrated knife may slice a loaf just as cleanly as one that costs less than $50. But the benefits of the more lavish blade—quality, ergonomics, sheer prettiness—might make it worth the expense.

Sharpening your lawn mower’s blade is key to a good-looking lawn. A dull blade creates ragged edges on grass tips that can ...

A good knife is the most important tool for a cook, but you must ensure you keep it properly maintained with either a knife sharpener or a whetstone.