FourShow 100-Piece Nylon Replacement Trimmer Blades — 90mm PA6, Fits STIHL Polycut 2-2/3-2 & Sun Joe/RedBack

If you use spindle-style or polymer blade trimmer heads, this FourShow pack gives you a ready supply of factory-length nylon blades to restore cutting performance. Each blade is molded from PA6 (nylon) and matches the original 90 mm length used by many Polycut-style systems, providing straight swaps for worn or broken blades. The pack of 100 is intended for frequent gardeners, landscape pros with multiple machines, or anyone who wants to keep reserve blades on hand for quick on-site replacement.

Which trimmer models will these blades fit?

These blades are made to the original length and fitment of popular Polycut heads and a few compatible cordless models. They are specifically listed as suitable for STIHL Polycut 2-2 and Polycut 3-2 systems and are compatible with FSA 45, FSA 57, and FSE 52 units. They also work with Sun Joe 24V-GT10 24-Volt iON and RedBack SWIFT 40V trimmers that accept similar blade profiles.

• Exact length: 90 mm to match OEM geometry
• Direct replacement for OEM part 40080071000 on compatible STIHL heads
• Cross-compatible with some Sun Joe and RedBack stringless heads

How well do the PA6 (nylon) blades cut grass and light brush?

PA6 is a resilient engineering nylon that balances flex and wear resistance for stringless cutting. These blades excel on lawn grass, weeds and thin brush, providing cleaner, vibration-reduced cutting compared with heavily worn edges. They are not intended for thick saplings, large woody stems, or heavy-duty forestry work.

• Best for lawn maintenance, tidy-ups, and weed control
• Not rated for cutting dense woody material or saplings
• Replace in pairs or small groups for even performance

Any preparation or tips to extend blade life?

Small preparation steps can meaningfully extend the service life of PA6 blades. The manufacturer recommends immersing the blades in warm water overnight before first use, which helps reduce brittle behavior in cold storage and improves flexibility during initial runs. Keeping blades clean after use and avoiding contact with paved surfaces will also slow wear.

• Soak blades overnight in warm water before first installation
• Avoid striking stone, concrete or metal to prevent chipping
• Store in a cool, dry place away from direct sunlight

How many replacements will this 100-piece pack provide and who should buy it?

A 100-piece set supplies many replacement cycles depending on how frequently you trim and the conditions you encounter. For homeowners who trim weekly through a season, this pack can last multiple years; professionals or large properties will appreciate the bulk quantity for routine servicing. It’s a cost-effective option for anyone who prefers stringless cutting heads and needs to keep jobs moving without searching for single blades.

• 100 blades per pack — bulk savings and fewer reorder hassles
• Ideal for seasonal homeowners, property managers, and landscapers
• Keep spares on hand to minimize downtime during maintenance

Who is this for: The FourShow 100-piece replacement blades suit homeowners who want an easy swap from frayed cutting lines to durable nylon blades, landscape professionals who need bulk replacements for multiple machines, and anyone using compatible STIHL Polycut heads or supported Sun Joe and RedBack cordless trimmers. If your trimming tasks are mainly grass, weeds and light brush, these blades deliver straightforward, economical performance without the need for metal cutting disks.