Specially designed for high RPM/feed rate CNC routers. Unique chipbreaker design is available with 'Up-cut' Or 'down-cut'. Will leave a wavy striated finish., #46223, direction down-cut, (D) diameter 3/8, (b) Cutting height 1-1/4, (D) shank 3/8, overall length (L), flutes 3, 46223 CNC solid carbide roughing spiral 3 flute chipbreaker 3/8 dia x 1-1/4 x 3/8 inch shank down-cut router bit