The 1930s Milling Tool Arbor Spacer by Scully Jones is a specialty machinist tool designed for precise adjustments in milling operations. Made in the USA, this adjustable arbor spacer is a quality piece of equipment for CNC, metalworking, and manufacturing tasks. This tool provides machinists with the ability to accurately space out components and ensure precise alignment during milling processes, making it a valuable addition to any workshop or manufacturing facility.