QUINT Premium Professional Triangles are manufactured from .320cm extra heavy premium fluorescent acrylic that will not discolour or warp with age and handling. They are machine cut and the edges of the tool are hand polished for maximum accuracy. The fluorescent colour is popular because the refracted light has an illuminating effect on the drawing by accentuating the triangle's edge. They feature a convenient circular cutout centre for quick and easy lifting from any angle. Packaged in a heavy duty protective polybag. Made in the USA.