These are prepaid cards used in the popular video game Free Fire. These cards grant you access to diamonds within the game, which are the main currency in Free Fire.

Diamonds in Free Fire are used to purchase a variety of content and cosmetic items, such as costumes, new characters, exclusive weapons, colorful parachutes, and other accessories that make your in-game character unique and stand out.

In short, you can use diamonds to make in-game purchases and enhance your experience and the appearance of your character in Free Fire.