This is a terminal block for a pair of contacts. The distance between the contacts is the standard 2 × 2.54 mm. Therefore, it is easy to install on any breadboard and allows you to fix the wires securely, no matter the type.
Multiple terminal blocks can conveniently dock with each other's grooves to turn into one terminal block into 4, 6, 8, etc. contacts.
You can be assured that your wires are secure by using the spring-loaded button. We suggest using wires with a thickness of 18-22 AWG with a maximum current of 8 A and a voltage of 300 V.