Two sided point counter dials

This is a two sided HP or damage counter for use in board games, card games and the like. The numbers range from 1 to 10 on one side and 11 to 20 on the other side. You can stack several to account for more than 20. When you are counting up or down and you pass 10 or 1 (or 20 or 11), just flip the disk over and keep counting since the one's digits will match both sides.