I'm not sure what constitutes an "engineer class" sign, but as an engineer I agree that it's a well-made sign. The aluminum looks good, no sharp edges and the reflective finish works great. I attached it side by side to the back of my SUV so I could legally drive it to a gas station as a "farm use" vehicle. This makes life easier, but as always check with your local laws for requirements and how and when to use them. As for the quality, it's excellent!
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