Mystery Bits

Jack found these bits in a drawer in his garage. Neither one of us can figure out what they are. They are about an eighth of an inch long and about 1/16" in diameter. The cone shape appears to be rusty metal, while the "head" end appears to be a darker metal.

They look like they could be little tiny feet for something. You pound the pointy end into a block of wood, and you have a round metal foot keeping the block a hair off the floor.

Or maybe they work the other way, and the head end is clamped in something so that the point protrudes.

Or maybe they are ... oh, I give up! Does anybody have any idea what they could be?

Update January 2017 replaced missing picture.