Description of Bosch 84207M Carbide 2 Flute Straight
2 flute design provides a smooth finish and good feed rates. Micrograin carbide tips give excellent smoothness of cut and long life. Balanced cutting with minimal vibration. Specially designed tips provide fast plunge cutting. Strong webbing and heavy cutter backing extend bit life.
The bit is probably good quality for a Chinese part but nowhere in the description does it say the shank is 1/2" in diameter! 1/4" for mine routers. The seller needs to revise the description