Vega T190R3A Impactech Square #3 Power Drive Bits feature a patented spiral torsion zone that absorbs impact resulting in longer tool life. Vega T190R3A Impactech Square #3 Power Drive Bits precision engineered tips are manufactured with a proprietary CNC machining process and are made from S2 Modified impact resistant steel. Vega T190R3A Impactech Square #3 Power Drive Bits are tested to outperform all leading brands in life cycle and tip failure testing.