BUYTUS Carbide Solid Valve Seat Blade Cutter Universal One-time Forming Reamer Tools 45 60 Degree(60 degree 1.8mm). Tungsten Carbide Solid Valve Seat Blade Applications Tungsten carbide inserts have a thin metal blade or disk with a sharp , usually toothed edge. Tungsten Carbide valve seat is used for cutting wood, metal, or other hard materials. They can be hand-operated or power-driven. Our carbide inserts have used in surface processing of cast irons, colored metal and alloys, as well as nonmetal materials for hard metal, carbide rough yurn, rough planning, and precision milling. The seat angle is 45°, and the sea width is: 0.8 mm, 1.0 mm, 1.2 mm, 1.8 mm. Package included:1pcs Farbe:One Color