It's a Modolo Race aluminum quill stem in an aluminum frame with an aluminum steerer carbon fork. I need to replace the headset. I built the bike a few years ago and am sure I used anti-seize on it, but it's my rain bike. I knocked whatever the grabber thing is down fine - I don't remember if it was a wedge or a tapered plug. The stem doesn't move, though. I'm good with destroying the stem, but don't want to damage the fork or do something that will make the stem even harder to get out.