Hey - Found an old box in the shed marked HD and it had these 3 bits in it. It's been there for a while and I have zero idea what the bits are for???? (the 2 on the left are solid square bar - one chromed, one not?)

Headlight mount  have they all got a hole though the side ?

Or they could be footpeg mounts as well.

haven't seen them used for a while, they usually have the fine UNF thread like the one on the right

The two on the left are solid square block (no holes?)