Edge Finder, 3/8" Shank, Starrett

I've been using this in my mill for a few months now and the 3/8" shank fits my chuck perfectly with zero wobble. The tip deflects smoothly and consistently, so picking up an edge on a vise jaw takes me maybe ten seconds. Way better than the no-name one I had before that would kick off center.

The 0.200" contact tip kicks off cleanly even on tight setups, which makes touching off on a vise jaw way less nerve-wracking. I was worried the 3/8" shank wouldn't fit my older collet, but it seated perfectly and runs true.

Snapped into my mill's 3/8" collet and the 0.200" contact tip kicked off cleanly on the first try. Way less guessing than eyeballing an edge with a piece of paper.