It is a Milling Cutter/CNC Tools/120 Degree V Groove Router Bit/Milling Tools. Flutes: 2. Degree: 120°. Material: High-speed steel, medium carbon steel shank, carbide-tipped. Mainly used for acrylics & plastics, carbon fiber, chipboard, laminated veneers, MDF, PCB, solid surface, wood and wood composite materials.