Teflon has become the go to material for making folding tools as it does not mar the material, due to its slick surface. Great for use on paper, fabric, leather, and other materials. Once you've used it you will see the difference.
The Folding Rib is a tool designed by book artist Christine Cox, owner of Volcano Arts. This is a great tool to hold, and fits really nicely in the hand. The ninety degree angle is excellent for box making and getting into otherwise touch to reach corners.
Dimensions: 4" x 1-7/8" x 1/8"