What are these called?
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Hi i need to know what these are and what they do. can someone help me please Image: https://i.gyazo.com/d20977ae6aaabc74117d488172f100cd.png
Hi i need to know what these are and what they do. can someone help me please Image: https://i.gyazo.com/d20977ae6aaabc74117d488172f100cd.png