RETRO WORLD KOREA - Collectible junk, shipped from South Korea
Retro World Korea
These are hard plastic toys that come from Taiwan. The name I found for them was 鬥片 which google tells me translates to "Fight Piece". They apparently go by a few different names in Taiwan. Here is a video of some dudes playing with the round types.
****Please closely inspect photos before making a purchase. Thanks!****