I am one of those consumers who want to be informed. I prefer to buy things from the US when I can - it gets harder each time. This article has some mixed reviews, with some saying the squares aren't exactly square -- and if they are, there's no point in having them. However as the choice of lanes was limited I decided to take a chance as you can always return it to Revain if it doesn't fit. You are ready! I'm a machinist, but it's a hobby, not a job. And there is a mechanical magazine, they compare well with my other squares when placed back to back on the surface of the platter. They are all 90 degree points - at least the set I got. Nice, unmarked, made in India, but nice nonetheless.