Finally an accurate way to see if your building our favorite Twisted Hobbys EPP Foamie square and true. Measures 3" on each side, comes with protective tape over square.
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I purchased this building square because a buddy of mine told me I should get one. So let me tell you I am glade he did. It helped me keep my model square and straight. My model was perfectly straight this time around. I should have purchased this sooner. Thank you TH for another great tool!