This sounds like a future topic to tackle, but let’s reveal the basic answer to this question now. Both straight and curved trimmers will let you trim grass around landscaping features, including trees, bushes, plants, and any area that your big lawn mower can’t reach. Straight trimmers have straight shafts, and curved trimmers have an obvious curve that sticks out 2/3 of their length down their shafts. Curved string trimmers are better suited for shorter people (under 6 feet tall), and straight trimmers are better suited for taller people. Keep an eye out for this future topic - we're doing a full article on the differences between straight and curved shaft trimmers very soon.