Quick question -

I picked up this Record track hub at the swap meet yesterday, and I'm wondering how I get the little cap things off. Do I just jam something into that little hole and yank on it? Are they threaded? They seem stuck on there pretty good - maybe they don't come off?

I want to get in there and do some serious cleaning of the races and cones. I don't think that they're pitted, but it would be easier to tell if I could gte them off.

Thanks!