"Found while going through grandparents items. The writing on the yellow cylinder is German, it contains 10 grams of iodized salt."
A: "Sewing accessories. For example, second from the left in the second row from the top is a presser foot. Lower right corner is an aid for sewing buttons and buttonholes."
This. Learning to sharpen your knife by hand is not easy at first, but it's worth it.
It detects the presence of an electric charge.