Likely used as a punch/awl to make holes in wood/leather would be my best guess. Awl's found here in the midwest are made from chert/flint/ bone. Bone ones are only found in dry caves. Some strange stone/ bone/ shell tools show up. Have a hard stone tool that likely used for a thimble/ hole punch receiver. Friend found it and gave it to me, never seen another like it. GW
