Don't use on a2 rifle buffer tubes - NcSTAR Pro Series AR Barrel Lower Receiver Wrench

This poor excuse for a tool damaged my buffer tube nut. Inspection shows that flats on the rifle buffer tube wrench are rounded. This makes it prone to rolling off the end of a rifle buffer nut at torque. I suppose you might get away with it if you held it perfectly straight at max torque. A surface like this shouldn't be used on an aluminum buffer tube through. The fit on the castle nut wrench is horrible as well, not going to risk using that. I'm going to try and return it. Oh heck, you got me,"Designed in American" but "Made in China"