These resistor networks are so handy for use on breadboards. They have 5 resistors, each connected to pin 1 with the other end connected to one of the other 5 pins. Take a look at the circuit diagram above and it should all be clear.
A common use would be as current limiting resistors for a set of LEDs, all going to ground. You could also use them as pull up or pulldown resistors.
We also stock them in 330 Ω