These are high quality sealed Double Pole - Double Through (DPDT) relays. This relay's coil is rated for 5V. The nominal operating current is 80.6mA so it will need additional circuity to close the relay with a microcontroller like an Arduino or SBC such as a Raspberry Pi or BeagleBone Black.
These are high quality sealed Single Pole - Double Through (SPDT) relays. This relay's coil is rated for 5V.
DIP breakout board for SOT23 packages. This will work with MOSFETs, Transistors, Voltage Regulators, etc.
Pins are 0.1" spaced for breadboard applications.
Use these roll pins to fix sprockets to a shaft and keep them locked in place.