Twist through its relatively fixed to the axis of the rotary cutting tool for drilling holes of the workpiece. Because of the flute into a spiral shape of cannabis named. Spiral groove 2 slot 3 slot or more slots, but slot 2 of the most common. Twist can be clamped manual, electric or hand-held drilling tool for drilling, milling, lathe machining centers as well as use. Drill material is generally high-speed tool steel or carbide.