FF GROUP TRIMMER LINE SAW CUT DUO CORE SQUARE 4.0mmX15m

FF GROUP TRIMMER LINE – SAW CUT DUO CORE SQUARE (4.0 mm × 15 m)

The FF Group Trimmer Line Saw Cut Duo Core Square 4.0 mm × 15 m is a heavy‑duty replacement cutting line designed for use in petrol and robust electric grass trimmers and brushcutters. This size and profile are ideal for demanding cutting tasks where thicker and more fibrous vegetation needs to be cleared efficiently and reliably.

This trimmer line features a square shape with a saw‑cut edge, meaning the cutting edges are serrated rather than smooth. The saw‑cut design enhances cutting performance by providing multiple sharp edges that slice through tough weeds, coarse grass, brambles, and light scrub with greater ease and reduced strain on the trimmer. Compared to round line, the saw‑cut profile delivers cleaner, more effective cuts on thicker materials.

The Duo Core construction means the line has a reinforced inner core, giving it extra strength and resistance to breakage. This dual‑layer structure helps the line withstand impacts against harder surfaces like stones, fences, and soil, so it lasts longer and maintains cutting performance over extended use.

With a length of 15 metres, this line offers ample material for re‑winding into your trimmer head, making it suitable for regular maintenance as well as challenging trimming jobs. The 4.0 mm thickness provides substantial cutting power, making it especially useful in larger gardens or areas with heavier weeds and overgrown vegetation.

Key Features

• Heavy‑duty trimmer cutting line for petrol and powerful electric trimmers

• 4.0 mm diameter for tougher vegetation and demanding tasks

• Saw‑cut square profile for improved cutting efficiency

• Duo Core reinforced construction for strength and break resistance

• 15 metres of line for extended use before replacement

• Ideal for thick weeds, coarse grass, brambles, and dense garden growth

🔧 Trimmer Line Size Guide

2.0 mm – 2.4 mm

Best for:

• Home garden trimming

• Light grass and thin weeds

• Lawn edges and finishing work

Why use it:

• Easier on the trimmer

• Less vibration

• Good for everyday grass maintenance

2.7 mm – 3.0 mm

Best for:

• Standard domestic trimming

• Medium weeds and thicker grass

• General garden upkeep

Why use it:

• Balances cutting power with smooth operation

• Works well in most home petrol/electric trimmers

• Suitable for regular trimming around fences, paths, flower beds

3.3 mm Saw Cut Duo Core

Best for:

• Tough weeds and coarse grass

• Occasional heavy trimming

• Larger garden plots

Why use it:

• Saw‑cut edges slice through fibrous stems better than smooth lines

• Duo Core reinforcement improves durability

• Great step‑up from standard round line for heavier growth

🌿 4.0 mm Saw Cut Duo Core – Heavy Duty

Best for:

• Very thick weeds, brambles, overgrown patches

• Rough grass and scrub

• Frequent or demanding trimming jobs

Why use it:

• Maximum cutting power in flexible trimmer line

• Square profile + saw‑cut edges = sharper, more aggressive cutting

• Duo Core reinforced for greater strength and longevity

• Reduces line breakage and frequent replacement

 Choosing the Right Line