The pliable design of this adjustable curve makes it ideal for virtually any project. It is made of flexible, shape holding plastic in your choice of lengths, and can be easily finger shaped to mirror any curve. One side has a beaded edge, while the other is flat to surface for precise marking. Can be finger-shaped to any curve. One edge is flat to surface for pencil. Made of flexible, shape-holding butyrate plastic. Other side has a bead for ruling pen.