Does one thing flawlessly - Real Avid Master Fit Extended & Standard Castle Nut Wrench

This is a professional grade tool, it matched up perfectly to the notches on my castle nut and I was able to easily torque it down to 40 lb without any issues at all. Don't make the mistake I did and try to save a few bucks buying a cheap multifunction AR-15 armorers wrench that breaks the first time you try to use it and then purchase this wrench, just buy this wrench first, it does one thing, it does it well, it's worth every penny.