Features: This is a face-end mill cutter for milling machines. Hardened and hardened with beautiful craftsmanship. Made of high quality steel Light cutting and low resistance The screws are locked, there is more space to remove shavings, and the removal of shavings is good. The blade can be adapted to a variety of materials. Non-hardened blade for cutting sheet metal Specifications: Model: R8-FMB22 7/16-20UNF Application: For assembling cutter heads in diameters of 50mm and 63mm.