Bosch 1 2 in Carbide Tipped Straight Router Bit Keyed Knobs Durable Safety Rating: 10 kA 1000088971 Durable Safety Rating: 10 kA interrupting rating with UL Listing and ANSI compliance Versatile Usage: Suitable for bathrooms 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 Bit Style Straight Number of Flutes 2 Overall Diameter 1 2 in Cutting Edge Length 1 1 2 in Bit Shank Diameter 1 2 in Overall Length (Inches) 4