ol' slant is dead... need help!

So I did the oil change and ran a magnet through the oil to see if I got anything and I couldn't see even a fragment BUT when I took off the oil filter, there were 2 centimeters long pieces of metal that were paper thin. What does that mean?? Could it be shavings from the oil pump or shavings from the oil filter factory??

Pictures would help. Were these under the oil filter?