What is this called?

Hello all.
I have this antique chest of drawers with these little metal things I've never seen before. The drawers slide perfectly because of them. It seems like they should be called sliders but that's the name used for mechanical ball-bearing thingies. I'd love to get some more but can't find them, probably because I don't know what they're called. Any help?
Thanks a lot.
Attachment 12259

Those are glides. I can’t tell too much because the photo isn’t in enough detail, however these are quite common. You can accomplish the same thing by tapping in a simple metal thumbtack into the same spot.

yeah, the camera I used isn't great. Interestingly enough, I had planned on using thumbtacks if I couldn't find the real deal.:)
Thanks very much.