Vega T125P1A Impactech Phillips #1 Insert Bits feature a patented spiral torsion zone that absorbs impact resulting in longer tool life. Vega T125P1A Impactech Phillips #1 Insert Bits precision engineered tips are manufactured with a proprietary CNC machining process and are made from S2 Modified impact resistant steel. Vega T125P1A Impactech Phillips #1 Insert Bits are tested to outperform all leading brands in life cycle and tip failure testing.