Whenever you are in need of a triangle, look no further than this set. It contains 8 different sized triangles, 4 each of 2 different shaped triangles. These dies are made from 100% steel and are compatible with most leading die cutting machines. These dies will work with your favorite cardstock, vellums, foils, and papers (all products sold separately). These triangles are part of the Delight Collection from Penny Black.