Boxurn 18 in String Trimmer Attachment for Power Heads — Aluminum Shaft, 18" Cutting Swath

Boxurn's 18 in. string trimmer attachment converts compatible power heads into a long-reach bump-feed trimmer with an 18" cutting swath.

This aluminum trimmer attachment gives you extended reach and a robust cutting swath without swapping engines or buying a whole new unit. Built from lightweight yet heavy-duty aluminum and engineered to accept common power-head couplers, the attachment installs quickly and uses two 8-foot spool lines in bump-feed style. It’s designed to pair with a wide range of major brands so you can expand the capability of an existing power head for edging, trimming under shrubs, and clearing fence lines.

How does this attachment mount to my existing power head?

Installation is straightforward for most consumer-grade power heads that accept a 1" diameter tube and square-drive shaft. The attachment features a female coupler sized to fit a .205" square-shaped drive shaft and the drive shaft itself is .200" across flats, matching common industry dimensions.

• Female drive shaft connector: .205" square shape
• Drive shaft: .200" across flats for compatible power heads
• Accepts power head couplers with 1" diameter tubes
• Fits many major brands including Ryobi, Craftsman, and Troy-Bilt

What cutting performance and line specifics can I expect?

The head uses two 8 ft. spools of bump-feed line and produces an 18" cutting swath for faster clearing of grass and light brush. The bump-feed mechanism lets you advance line quickly while working, reducing interruptions and maintaining consistent cutting width.

• Includes two 8 ft. spool lines (bump-feed)
• 18" cutting swath for broader coverage per pass
• Line is easy to load and replace in seconds
• Durable construction tolerates regular trimming tasks

Will this attachment handle tight or hard-to-reach areas?

Yes — the straight shaft design adds reach and control, making it simpler to trim under low branches, around landscaping features, and along fences. The added length helps keep you upright and steady while targeting awkward spots without bending or kneeling.

• Straight shaft extends reach for under-bush and fence trimming
• Lightweight aluminum keeps the tool maneuverable
• Maintains cutting control in confined or uneven terrain
• Reduces strain by allowing more upright posture

Who is this for? Homeowners and property caretakers who already own a compatible power head and want to expand its capabilities will find this attachment useful. It’s suited for those who need an economical way to add an 18" bump-feed trimmer to their toolset, and for users who prefer a lightweight, durable aluminum shaft for better reach and easier handling. If you use power heads from brands such as Ryobi, Greenworks, Craftsman, Troy-Bilt, Remington, or similar, this attachment offers a practical upgrade to speed up trimming jobs and reach trickier areas without replacing your entire machine.