RUKO Drill Bits & Parts Metal twist drill bit 616441 - RUKO 215045, The RUKO 215045 is a metal twist drill bit designed for precision drilling with a diameter of 4.5 mm and a total length of 80.0 mm. Manufactured in accordance with DIN 338 standards, it is suitable for machining steel and sheet metal. Ideal for use in various machining applications, this high-performance drill bit offers reliability and durability. RUKO 215045 Metal Twist Drill Bit 4.5mm 80mm High Performance