Vega Impactech Double End Power Drive Bits feature a patented spiral torsion zone that absorbs impact resulting in longer tool life. Vega Impactech Double End Power Drive Bits precision engineered tips are manufactured with a proprietary CNC machining process and are made from S2 Modified impact resistant steel. Vega Impactech Double End Power Drive Bits are tested to outperform all leading brands in life cycle and tip failure testing.