The PFERD Chisel Bit Three Square File 7" is the ultimate chainsaw sharpening file engineered to breathe new life into your chisel bit saw chains. This file is specifically made for servicing and sharpening saw chains with a square gullet chisel chain. When your chain's teeth have that distinct square profile, this square file chainsaw ch
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I have used the Pferd double bit flat files and I find the smaller triangular shaped file to be easier for me file with - I have better visibility into the corner with the smaller file. They seem to cut a little better as well. I plan to have my son who uses the double bevel file try the smaller file to see what he thinks. Time will tell but I will very likely order more of the smaller file in the future. Both files are good files but I prefer the smaller file based on my filing experience.
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Butch · September 24, 2026
Cut smooth and with less passes than round filing. I’m converting over for half my chains and haven’t used a file long enough yet to say anything about how long it lasts, but satisfied with the change over.