I bought these to switch-in in place of other dice and then put into a spectator's hands, with some
sort of line like "Did you see me cheat you? If you look at the dice closely you can see that
they're crooked."
That said, these are very cheaply made. I bought two sets. All four of
the dice have an air bubble visible inside them. Not a big thing in what are gag dice, but an
indication of overall poor quality manufacture.
The bigger issue is that they not uniform
in size from one package to the next. One set that I received is approximately 1" on a side. (Since
they are not cubes, no face is has the same dimensions as any other.) The other set is closer to
3/4" on a side. This, actually, I prefer as it is a more comfortable size to palm. If I could be
assured of getting the smaller size I would order a few more pairs.