It is a Carbide Cutter/Milling Tools/CNC Tools/Milling Cutters. Shank diameter: 1/2 inch (12.7mm). Total length: 3-3/16 inches (81mm). Material: High-speed steel body, medium carbon steel shank, carbide-tipped edge. Perfect for a variety of materials from wood panels, flakeboard, plywood, MDF and other wood composites sheet materials; can also be used in all handled and table mounted routers.