The Curiosity shop’s owner really didn’t know much about artifacts, but he did know about what would sell. This is a shaper for arrowhead shafts. If like today’s brass knuckles, why would there have been holes in the center???Lot of work there. I believed the “Hand Killer Stone” as a boy and young adult as did my dad, but the archaeologists who saw this collection when in Greenville, Maine, set the record straight.