mystery tool, can anyone help?

Hi to all,

could you please take a look at this strange tool that I found in my FP2's stuff? (that's the main reason I am asking here and not in 'general', though I can't see how this can be used on an FP2)

It seems like a tooling adaptor, but have no idea what kind of machine it is intended for.

One side has an internal taper (did not measure angle) and a 13 mm spigot internally threaded to M8.
Other end has a female 30 mm register and some thread further in.

It is marked Co Tools (searching for co tools online only provided a single picture I think of some other tooling), it is swiss made, brand new and amazingly finished.

Any ideas?











Thanks in advance.

Best regards,
Thanos