During the shredding of paper, dust gets between the blades of the machine. This will eventually result in wear and tear on the blades. This HSM paper shredder oil cleans the knives and lubricates the cutting mechanism. That way you can shred longer with your device. Simply pour some oil into the chipper feeder and then shred a sheet of paper. Or pour some oil over the length of the paper and feed it into your appliance.