Unidentified frame chasing parts

ynyswen24 Posts: 703
edited February 2011 in Road general
I hope somebody can help with this.

Some friends of mine bought some good quality frame chasing and reaming tools off the e-bay as a job lot (BB chasing and facing tools, Campag and Silva and seat tube reamers). As part of the box load they got, from somebody who's father-in-law was frame building but had retired - unfortunately I haven't got the guys name - there was the following unidentified object. It clearly has that slotted end to fit into the chuck on a drill or drive motor but what it does god only knows.
Any ideas? If anyone can help I'll get Jose and John to buy you a coffee at the Handmade bike show in Bristol in June...


And apologies for not having a Flickr account or similiar.