A string trimmer is an invaluable piece of your lawn care tool box. Whether you’re tidying up the edges along sidewalks, freshening in and around flowerbeds, or adding a crisp edge to your driveway, ...

Under normal use, you need to advance your string trimmer’s nylon cutting string whenever the tool isn’t cutting effectively. That happens every few minutes or even quicker in tall grass and weeds.

The string trimmer is both a blessing and a curse. It can be a tremendous labor-saving device that neatly tidies up shaggy grass along flower beds, around posts, and down the edge of sidewalks. But a ...