Small triangles are useful for a number of bookbinding, boxmaking, and conservation tasks. This 45˚ triangle is made from stainless steel, so it is safe to be in contact with paper and artifacts. It measures three inches on each of the short sides, and is .05 inch thick, which is the same as 50 points in printing and bookbinding. The knurled knob aids in holding it in place, as well as lifting it up. The edges are deburred; it feels comfortable in the hand and is smooth to cut or mark against. There is not a lot to say; this is a very nice triangle that will last many lifetimes. Actual size ranges from 2.75 - 3 inches and .05” thick.