Features 1、The straight shank step drill is made of high-speed steel, with high hardness and wear resistance. 2、Spiral chip flute design, chip evacuation is more glossy and not easy to be blocked, improving work efficiency. 3、The elongated round shank is stable in clamping and can be installed on a variety of electric tools. 4、Equipped with wrench and other tools, often used with an oblique hole device, to easily punch holes in the board. 5、Large diameter creates flat-bottomed hole, drills easily into any kind of wood, and leaves a clean hole. Specification Item Type: Twist Step Drill Bit Material: High speed steel Color: Golden Shank Diameter: Approx. 9.5mm / 0.4in Package List 1 x Drill Bit 1 x Accessories 1 x Wrench