ALVIN 12 inches Clear Professional Acrylic Triangle Ruler 4590 Degrees Model 131C12 Multipurpose Tool for Drafting Design and Architecture Great for Machining and Woodworking

Will not discolor or warp with age and handling. The machined finish and hand-polished edges of the C Series (clear) and F Series (fluorescent) meet or exceed government specifications. The F Series is extremely popular because the refracted light has an illuminating effect on the drawing by accentuating the triangle’s edge. All models feature a double-taper cutout center for quick, easy lifting from any angle. Supplied in poly bag with hanging hole.