Amana Tool RC-1102 Insert V-Groove 90 Deg x 3/4 CH x 1/2 Inch SHK CNC Router Bit 1/2 Inch Shank Advantages of Insert Tooling: Long lasting insert knives provide superior smooth quality cuts every time Quick and precise replacements of dull knives Due to insert accuracy tool life is extended Insert tooling allows for harder grades of carbide Special carbide grades for special applications Knives can be re-sharpened multiple times without affecting the original profile Cost effective solution compared to replacing brazed router bits SPECIFICATIONS: (D) Diameter: 1-1/2 (a) Angle: 90 (B) Cutting Height: 3/4 (d) Shank: 1/2 Overall Length (L): 3 a1: 45 B1: 1-1/16 Cutting Edges: 2 Max RPM: 18,000 L1: 1-25/32 Flutes: 1 # of knives: 1