Review on Inches Double Split Collar Screws by Vedavyas Fleming

These rings fit perfectly on my 1/2 inch bench grinder and still hold up great. Seems to be of decent quality too. However, as another reviewer pointed out, you need a 9/64 bit to tighten a hex bolt, and most hex wrench sets don't include this size. Luckily I was able to find another style that worked. I'm deducting a star for that alone.