Shredders with a safety sensor shut off automatically if hands come in to contact with the shredder's opening.
Feeding in more paper than the recommended capacity can cause jamming and damage to the shredder. Keep this in mind when shredding folded papers or heavier paper types such as cardstock or file folders.
Paper draws moisture out of it's surroundings, therfore, the shredder's teeth should be lubricated regularly to keep the machine operating smoothly.