Glad you asked! Those are Jatukarm Ramathep amulets. Who is Jatukarm Ramathep? Well, according to this recent Editoral, entitled, “The facts behind the Jatukam Ramathep talisman nonsense” in The Nation:

As a result they have confused the two guardian deities, Khattugama and Ramadeva, and conflated and corrupted their names, producing Jatukam Ramathep, a single deity without a historical background.

History or no history, if you want to jump on this tailsman fad, you can get yours on EBAY.
You can even get the T-shirt. More thoughts.