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I Filed Backwards 2500 times and this happened.

Fireball Tool

I put files to the test to see if backdragging dulls a file like many claim. I test coarse, medium, and fine files after I built a large testing rig to stroke tens of thousands of times. I also test if backdragging unclogs files. I use the slowmotion camera to analyze the results and use a microscope to observe all the files!

Get the Pferd Files Here!

Our New Hardtail Vise

The Gloves I Wore

How did I build this Machine?

Musicbed SyncID:

posted by mywarcrya9