This dice utilizes an extra thick wall to add shift the center of mass just enough to cause the dice to roll 1. After 3 rounds of 40 rolls, this dice rolls 1 an average of 42% of the time and makes an average roll of 2.5. Printing at 100% infill will generate the most rigged dice possible. The more bounces the dice makes, the more likely it is to land on a 1. Works great as a troll dice for board games or DnD. Works great as a lesson on statistics and probability.