This is a die with 12 sides, numbered from 0 to 9 with a comma and a minus sign.
Very useful for solving math exams.
Roll digits until you get a comma, then keep rolling digits until you hit the comma again, and that's your random number with a comma. Whenever you hit the minus sign the sign of your number is inverted.
Make your own personalized keychain, with your own pictures and three messages on it. Also available in Heart, Round, Triangle, Pentagon and Star shapes!
Warning: May break on relatively heavy impact, such as from a hammer, or being thrown out of a window. Surface will likely show scratches after some time. Do not try to eat it either, it's not a good idea.