First off, The product is garbage and barely works. I spent 40 minutes using this thing and filed not even really noticable amount of the nail off. BUT THE REAL PROBLEM IS, at the same time the grinding nail is filed off and smells horrible, i thought nothing of it and within 15 mins after using my eyes are absolutely burning and so dry. The filed nails file off almost in a smoke form except its extremely dirty nail particles and now my right eye is extremely irritated. I am so mad! I have never ever had any eyes issues and am certain that this is directly related to this piece of crap. I wish i could do more about this than writing this complaint. I wish i could sew... this is bullshit.