The best for small sizes
- Familiarity: I've put it through the wringer
Master Cams are untouchable for fingers down. They have a perfect combo of 4-lobe security, narrow head width, nice action, and flexy stem. I do carry some C3s for doubles for super narrow spots, but I almost always reach for the MCs first.
Size 0 and 00 are not ideal for free, since C3s and TCUs in this range are a couple of Kn stronger. C4s are better from .75 up. But blue through red MCs are some of my favorite pieces.