This 9" long folding bone features two rounded sides. Bone folder tools are used as an accessory for hand-folding and scoring/creasing paper and cover stock materials. They offer a handy way to make a straight dent along a sheet, making folding thick stock easier. They are also a great tool for making your own pads of paper, and so much more. Folding bones are made of genuine bleached bone, but never from endangered species' or ivory.