4 stars only because my use is "off label", but it seems to perform well in that task. - Hornady Sure-Loc Lock Ring

I needed a ring that would work in my Forster Co-Ax, but had flats on it to tighten a bullet puller collet. It is working well in that role. If I had access to my shop, I would have milled a couple of flats on a Forster ring so I dont have to worry about the steel ring wearing and scratching the bearing surfaces of the press.