These are two pin jumpers (also called shunts) that will create an electrical connection for the 2.54mm(0.1") male pin headers. Commonly used to modify settings on a board or device.
Jumpering pins together! Yes!
Q: are these jumpers open or closed top? Thinking of using them to connect resistor and LEDs together without soldering so would need to be able to thread the leads all the way through.
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