Bosch 85242MC Double Flute Straight Router Bit, 1/2" x 1-1/2"Highlights: 1 2" shank Overall length: 3 1 8" Cut diameter x Flute: 1 2" x 1 1 2" Straight Carbide tipped Double flute Micrograin bits designed to give excellent smoothness of cut and balanced cutting with minimal vibration Positive hook angles cut efficiently while specially designed tips provide fast plunge cutting Strong webbing and heavy cutter backing extend bit life