Fishing lure. You will need to add an appropriately sized split ring and a treble hook before you can catch anything.
An alternate version that has been smoothed to soften sharp edges may be found at the following
link
https://www.shapeways.com/product/STPFZFPJJ/fishing-lure-wedge-no-eyes-smoothed?key=a2e6cb02d609b9ce3b5b2e517558eaf6