Clamped to the shaft of virtually any string/line trimmer tool, the dual-wheeled Trimmer Trolley attachment allows the tool to function as an edger as well as a trimmer. Because the attachment provides a stable platform, the tool can be pushed or pulled (at normal standing height), rather than having to be lifted and carried. For trimming (e.g., rockery, fences, building foundations, hard-to-mow areas), the Trimmer Trolley is affixed so the string rotation is horizontal, ensuring uniform mowing height; for edging (e.g., sidewalks, driveways, curbs), the attachment is affixed so string rotation is vertical, allowing for consistent depth and width. Caster wheels are provided for mowing slopes, ditches, and clearing brush/weeds. The Trimmer Trolley also has blower and power-washer applications.