Some gasoline models have a two-cycle engine, which uses a blend of two-cycle oil and gasoline in the gas tank. Gasoline models with a four-cycle engine do not require mixed gasoline.
D-handles are usually adjustable and allow for left- or right-handed use.
A strong monofilament nylon line serves as the cutting blade. Cutting path is typically 17”.
Straight shaft trimmers allow for easy trimming under shrubs and branches. Curved shaft trimmers are easier for trimming along sidewalks, etc.
Some models have a head that can twist and convert the tool into an edger.