This folder is carefully designed to accomplish all the general uses a bookbinder or conservator has: scoring, folding, turning-in, applying non-marring local pressure, large scale smoothing. The small rounded tip area is shipped slightly blunt, but it can be sharpened if you prefer. Delrin is hard and stiff like bone, but has a coefficient of friction similar to Teflon. It can hold a much thinner and sharper edge than Teflon, though is not as hard as bone. It has a nice, non-plasticy feel. I saw, file, scrape and polish these from a solid block of Delrin. More information.  Approximately 7 x 1 x .375"