Clockmakers’ pivoting drills, and the arbours appear to be the type that will fit either a clockmakers’ bushing tool similar to the Bergeon bushing set, a staking anvil, or a drilling tailstock attachment
The collars appear to be adjustable depth stops.
Depending how small the drills go, there could be watchmaking drills amongst them, probably pocket rather than wristwatches.
If you don’t want or need them, I can give them a very appreciative home
Best regards
John
Edited By RJW on 06/03/2011 15:12:06