For decades, craftsmen have used squares to layout projects on flat work pieces. Another handy layout tool, but often overlooked, is a triangle. It simultaneously serves as a square and a 45, all in one. A pocket or apron sized triangle is just the tool for squaring from the inside of boxes and drawers during assembly. Triangles are also great tools for quickly drawing perpendicular lines from an inside reference edge. The design of our new PRECISION TRIANGLES were inspired from a small, apron pocket sized triangle I inherited from my Father In Law. As a pattern maker's apprentice in the 40's, he learned early on the value of this simple tool. Well, now you can to. We've manufactured these anodized aluminum triangles to extremely accurate standards and guarantee perpendicular accuracy to well within .001". Both sides have been carefully laser engraved with inch markings. Available individually or as a set.