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.

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? The string trimmer is both a blessing and a curse. It can be a tremendous ...

Consumer Reports reveals the best string trimmers you can buy right now. Our tests find that you don't have to pay a lot to ...