When I ordered it a few days ago, there were two versions. I can't remember which one I had, but it was the old one as the current one was labeled "New Version". I can't confirm how well the new version works, but I've seen some conflicting reviews, just wanted to point that out. That's why I chose the old version. I measured mine against the famous 90 degree square I use to line up my table saw and it was accurate. I then compared them to each other, inside and out, for both and they were fine too. Great suggestion and it works!