[Specifications]- Twist Drill Bits Diameter: 2mm / 0.08-inch; Drill Bit Length:150mm / 5.91-inch; Shank Diameter: 2mm / 0.08-inch; Total Length: 200mm / 7.87-inch; 4 x Straight Shank Twist Drill Bit [Strength and Hardness]- Made of high-speed steel.