8" Aluminum Triangle Ruler in 30º / 60º / 90º Triangles.
These excellent tools for commercial artists, draftsmen and for crafts of all kinds. They are calibrated in sixteenths of an inch on one edge, one side. This triangle has 20 circular template holes. The diameter of the circular template holes range from 1/32" to 31/32". Excellent tool for both ruling and cutting.