They're like little 30cm (12") high-quality extension cables for your breadboard. Actually, they ARE little 30cm high-quality extension cables for your breadboard!
It's not often you'll need these, but when you do, they'll make your experimentation much easier! Measuring 30cm (12") long, this 10-pack of multicolored jumper wires will save your butt during your breadboard experiments. Comes as 1 package of ten jumpers (colors shown).