“My friends grandparents passed and he grabbed these but has no idea what that are”

Mid century nut crackers, possibly 1940’s or 1950’s. A sharp tool used for digging the edible portion out of a nut.
These are used to clean out nut shells – most especially chestnuts! My grandparents had a wooden bowl that looked like a hollowed out tree trunk with holes that held these & a place for a nutcracker as well!
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