A bunch of metal servo horns!
These are the end pieces that connect onto servos. Why are they called horns? I dunno, I guess antlers sounded crappy. Or it could be that the original horns were actually horn shaped.
Regardless of etymology, these are a far better horn than the plastic ones most servos ship with. These will eliminate unnecessary wiggle in my robots.
On a side note, a shop for Australia that has a very nice selection is Little Bird Electronics