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When the chain starts dragging, slows down, or just doesn’t bite like it used to, you don’t need a full grinder—you grab the Stihl 4.0 mm round file. This file is made for chains with a 3/8" PICCO™ or 1/4" pitch. The hardened steel construction resists wear and holds a sharp edge so you can hammer through touch-ups without swapping files every few cuts.
Each file has a usable length that gives you control and reach, even deep in the teeth. With the right angle and steady hand, you restore the cutter geometry, reduce vibration, and keep your saw cutting smooth—all without forcing it. Because when your chain is sharp, you waste less fuel, reduce strain on your arms, and finish the job faster. We offer it in a 3-pack, and can make it availible as a 12-count box (four 3-packs) so crews and shops never run out. It’s a no-brainer for guys who keep their gear tight. Use it with your file holder, your filing jig, or just by hand—this file delivers every time.
