Review on 📐 General Tools 29 Plastic Protractor: Accurate Angles with Durable Construction by Christian Bar

Thing is flimsy junk, you can tell where it was assembled, they used heat to push the rivets through for the connectors. If you look at this picture you can see where these short arms connect to the longer rivets and melted the plastic too much making the rivet hole too big. So my 90 degree angle is closer to 87 degrees, I measured it at work with a carpenter's square and goniometer. Terrible quality, I would return it if I had the time.