Fairgate 10" aluminum triangle. These lightweight, durable 30/60 aluminum triangles feature a matte-satin finish that resists stains and tarnishing. These quality aluminum triangles feature 1/16" graduations on the 90 degree angle. May also be used as a template for circles from 1/16" to 1-3/8". Perfect triangle for the home, office, studio, or shop. Fairgate 10" 30/60/90 aluminum triangles are made in the USA.