I found a few situations where I couldn't use/tighten standard rings on my new Gen2 Zero so I grabbed a box of 9 rings and wrench for a good deal from a member on here.
They are excellent. My wrench locks right in and tightens tight up without any effort. Very easy to set the die where you want it and lock it in.
No issues of chipping finish here, I mean mine are nitrided so nothing to chip..
Also very thick and beefy and solid.
They do exactly what they were designed for, expensive but mine are very well made like every other Area419 product.
My $0.02