Therwen Sprinkler Head Grass Cutter 3.5" Drill Attachment — 2-Piece Kit, Resin Gear Teeth for Fast Pop-Up Head Trimming

Therwen 3.5" Sprinkler Head Grass Cutter is a drill-mounted trimming attachment that removes grass and weeds around pop-up sprinkler heads to keep irrigation flowing freely.

Keep sprinkler nozzles clear and flowing without kneeling or using hand tools. This two-piece kit attaches to standard cordless drills and was shaped to work around pop-up irrigation heads, cutting a defined ring of vegetation so water sprays aren’t blocked by turf or encroaching weeds.

How does the cutter make sprinkler maintenance faster?

Instead of hand-trimming with shears or digging out sod, this gear-shaped 3.5 inch cutter spins from a cordless drill to quickly slice surrounding grass. The radial teeth create a clean clearance zone in one pass, saving time during seasonal maintenance.

• Fits common cordless drills for fast setup
• 3.5" diameter clears a consistent ring around heads
• Pointed gear design reduces drag for quicker cuts

Will it fit my pop-up sprinkler heads?

Therwen designed the trimmer to be compatible with most standard pop-up sprinkler heads and similar irrigation fittings. Its adaptable mounting and compact diameter allow it to operate around typical head dimensions without contacting the nozzle.

• Universal sizing for many residential sprinkler brands
• Compact profile avoids hitting the riser or nozzle
• Two-piece set covers multiple heads during one session

What materials and durability can I expect?

The cutter is molded from glass fiber–reinforced resin to withstand repeated use and resist wear from turf and light debris. While not indestructible, the construction gives lasting performance for routine lawn upkeep without metal corrosion concerns.

• Glass fiber reinforcement for strength and longevity
• Resin body resists rust and light impacts
• Engineered teeth maintain cutting profile through many uses

How do I operate it safely and effectively?

Install the trimmer into a cordless drill chuck, position it around the pop-up head at low-to-moderate speed, and sweep evenly to remove turf. Use protective eyewear and keep bystanders clear; avoid forcing the tool into hard objects or gravel.

• Secure in drill chuck and tighten before use
• Run drill at controlled speed to prevent kickback
• Clear loose debris after each pass for consistent results

Who is this for: Homeowners, landscapers, and irrigation technicians who maintain turf and want a quicker, drill-driven solution to free pop-up sprinkler heads from grass and weeds. It’s suited to residential lawns, small commercial landscapes, and anyone who prefers a less-mess, repeatable trimming method to keep irrigation systems performing uniformly.