Collet knobs are made from nylon 6 material and are available short, ... Collet knob, plain, 11mm diameter with .125" shaft. Collet housings and nuts are made of brass.
... Read more
The architecture of the Arch is one of its most interesting aspects. Learn more about the materials and techniques used in the construction of the Arch in a detailed account by J.E.N. Jensen, Associate Director of the National Park Service.
