This is a node that I developed during my 'York Minster gothic wood' project - https://www.artstation.com/artwork/k8P6A. It takes curve adjusted gradient inputs and converts them into a shape with radial symmetry, simulating a lathe. It's now been heavily improved in both speed and accuracy and gives the user more flexibility and control than previously. It's also now available on my Gumroad - https://gumroad.com/l/mtlathe.
The material used is just a quick oxidised brass that I thought would show up the contours nicely. It's not included with the node.