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As Peppycito said, they don't make sparks, which is important if you're working somewhere that could have explosive fumes. The lanyard is traditional for sailors' tools to prevent loss as well as dropping it on someone below. Mostly decorative now but it's convenient to be able to let go of the tool if you need both hands for something.
Regarding food, is there a food bank nearby? There's no shame in going to one, they are often trying to get rid of surplus food before it goes bad.