I purchased this triangle to sketch diagrams at work. I have other "less expensive" triangles that have gradually, somehow, developed dents on the straight edges. This triangle feels very good quality, but...... I'm disappointed that I can't see underneath the triangle at the edge. They built the edge with the "offset" too close to the edge. My sketches require precision, and with the offset so close to the edge, it's hard for me to pick up the exact point to begin my lines. It's hard to explain, it's like if the offset messed with your eyes and you see two edges. Had they build the offset twice as far like my other "less expensive" triangles, this would have made it to the top. Again, this is a very high quality triangle and this may be the perfect tool for everyone else, just not for me.
Rating: [3 of 5 Stars!]