Review on Accurately Measure Angles And Levels With GemRed XVB Digital Gauge Level Box For Pipe Conduit by Steven Jackson

Great little angle finders. I use these with Paco Motorsports hub stands to align my cars. They seem to be accurate to 0.1 degree without any issues. Be aware that magnets are only on one surface (bottom). The display does auto-invert if it detects it is upside down. Work well. I've dropped them a few times and they still seem to work OK (seem durable). Easy to read with the backlighting even in the sun.