DEWALT Impact Torsion Pozi Bits have a 15° torsion zone that allows the screwdriver bit to flex rather than break, and the full fit head prevents rounding of the screw head and prevents 'cam out' (bit head slipping out of the screw head due to the turning force).
Faithfull Professional 1/4in Hexagon Drive Impact Screwdriver Bits are specifically designed and for use in high torque impact drivers. Manufactured from a unique material specially engineered for extreme durability these bits have an increased working life compared to standard screwdriver bits.