Six O Two
(Marco)
A while back I won an auction lot, mostly for a 3-jaw chuck. The lot also had a few other bits thrown in and I'm not really sure what they're for, and my curiosity is getting the better of me. Also, if you were bidding against me and were actually interested in these items rather than the 3-jaw, let's chat 
First up is a pile of these bars. The post on the end is 5.5mm dia, or 7/32in. I'm guessing they're bars for holding dial indicators like this?
Seems a lot of them though... and no swivel clamps in sight.
Next was 3 of these clamp things. Looks like 2 of them might had arms sticking out the bottom at some point, but no longer.
Bonus round: A key with a half-moon slot; a bearing with plastic hex hole and steel cage; octagonal carbide inserts for... ; and some weird knurled thing with a through hole...
Any thoughts?

First up is a pile of these bars. The post on the end is 5.5mm dia, or 7/32in. I'm guessing they're bars for holding dial indicators like this?

Seems a lot of them though... and no swivel clamps in sight.

Next was 3 of these clamp things. Looks like 2 of them might had arms sticking out the bottom at some point, but no longer.

Bonus round: A key with a half-moon slot; a bearing with plastic hex hole and steel cage; octagonal carbide inserts for... ; and some weird knurled thing with a through hole...

Any thoughts?