The Extreme Dewalt torsion bits have "ExtraGrip" ribs for optimum grip and a hardened bit core for increased strength and durability. The special torsion zone ensures optimum torsion properties during sudden torque peaks and reduces the risk of breakage. Manufactured from European high-performance steel, these bits are designed for a long service life. High quality screwdriver bits are available in two new grades: Torsion and Extreme Dewalt. All bits come in a robust, resealable, pocket-sized plastic box. The hardened bit core ensures greater strength and a longer service life, while the special torsion zone improves the turning properties during sudden torque peaks and further reduces the risk of breakage (torsion bits only). Application examples: Suitable for all screwdriving applications.