EnPoint&trade; Carbide-Tipped 2 Edge High Speed Steel HSS Miter Folding V Groove Router Bit 1/4" Shank 90 Degree 1/2" Cutter Dia Titanium Coated 3D Sign Making Engraving Tool Woodworking Bevel Cutter Flutes: 2; Degree: 90. Shank diameter: 6mm (1/4 inch). Cutter diameter: 16mm(1/2 inch). Total length: 44mm (1-47/64 inches) High-speed steel, medium carbon steel shank, carbide-tipped made! Durable service and long lifespan! V shape grooves design and Titanium coating, easy for chips removal and high temperature and wear resistant! Multipurpose: Mainly for acrylics & plastics, carbon fiber, chipboard, laminated veneers, MDF, PCB, solid surface, wood and wood composite materials.