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. Includes (1) x 4.5″ and (1) x 6.25″ Triangle and storage board.