Bosch Drill Bits & Parts Metal twist drill bit 607628 - Bosch 2608577173, Bosch offers the 2608577173 metal twist drill bit, designed for precision drilling in metalwork. This 9 mm twist drill bit is ideal for machining tasks and sheet metal applications. Known for its durability, it is a reliable tool for both professional and DIY settings. Bosch 2608577173 HSS Twist Drill Bit 9mm Fast Metal Drilling Self-centering