Updated September 16, 2026. Disclosure: As an Amazon Associate, we earn from qualifying purchases. Quick answer: The Greenworks STF457 sits between light-duty homeowner trimmers and premium high-voltage models. It combines a 16-inch cut, brushless top-mounted motor, 0.080-inch dual line, and an attachment-capable shaft. The main caution is weight: Greenworks lists 9.7 pounds before the battery… Continue reading