This is a pack of "Dupont" style connector housings, male crimp pins and female crimp pins.
Dupont connectors can fit into standard 2.54mm (0.1 inch, 100mil) PCB header pins and sockets, or of course can plug into each other. A standard cheap and easy method to connect wire to board or wire to wire for data and low current power.
To crimp Dupont connectors they are large enough that you can get away with needle-nose pliers for the occasional job, or if you need to crimp them more often then you'd ideally you will need a crimping tool, sometimes I stock them (see my other listings) but if not Jaycar does.
Check out my guide to crimping Dupont and other connectors at this link. If crimping isn’t your thing, you might want to see my dupont pre-wired and housing assortment instead.
Each pack includes:
Notice that only single row housings are included, because to make a double row just use a dot of super glue and stick two of the singles back to back, no need to be having twice as many types as you would ever need!
So grab yourself a pack and get to tidying up that mess-o-wires in your projects!