Grass trimmers are designed to keep lawn edges looking neat, but only the best can tidy and trim hard-to-reach grass without hassle. The worst we’ve tested leave behind straggly grass and stubborn ...

When I bought a home 25 years ago, for the first time, I needed to mow my own yard—an 80-square-foot, postage-stamp-size area. I got a hand-me-down corded string trimmer and started hacking away with ...