A unique shaped, three sided, fudge/fate die. (
also available pipped normally 1 through 3)
The result is shown at the top vertex (a plus, minus, or circle has been bored through).
This shape is made from a filleted cube.
I read about this shape from Don Simpson here:
http://donsimpson.deviantart.com/art/My-Three-Sided-Dice-174907296
Note: To purchase one die select "d6" from the sides menu (it's a d3 but that isn't an option with Shapeways Variants feature). To purchase 4dF, select "Polyhedral Set" from the Sides menu.