STIHL FG 4 roller filing tool for 3/8" P chain Ø 4.0 mm

If your chainsaw starts grabbing or cutting slowly, you don’t need a full workshop session—just a quick, precise touch-up. The STIHL FG 4 roller filing tool guides your file at the correct angle so you can sharpen smoothly and accurately with minimal effort, ideal for regular upkeep of 3/8" P chains with a 4.0 mm file.

Built compact and easy to carry, it gives professionals and keen users a consistent result week after week. A built-in filing plate helps you set the depth gauge distance correctly after sharpening. File not included.

Where it shines

• On-site touch-ups between bigger jobs
• Keeping pruning saws with 3/8" P chains cutting fast
• Regular weekly maintenance without a bench grinder
• Clean, repeatable angles for longer chain life

Why you’ll like it

• Accurate guidance: Roller design keeps the file on angle
• Effort-saving: Smooth, low-friction filing strokes
• Consistent results: Depth gauge plate sets the distance
• Grab-and-go: Compact, durable tool body

In everyday use

The FG 4 feels intuitive—set it on the chain, make steady strokes, and you’ll see even, sharp cutters without fighting the tool. Its compact size fits easily in a tool bag so maintenance never gets skipped on busy days.

Capacity and essential details

• For 3/8" P chain pitch
• File diameter: 4.0 mm (file not included)
• Built-in plate for correct depth gauge setting

Advice from gardenmachineshop.com

Count your strokes per cutter (e.g., 3–5 per tooth) and match that on both sides—consistency keeps the chain cutting straight.

Returns: as a consumer you can withdraw from your purchase within 14 days of receiving it, without giving a reason – this also applies to parts we order in specially for you. See our Refund & return policy for how to return an item and who pays the return shipping.