The DEWALT Torsion Phillips Bits with a hardened core for extra strength and durability. They have a flexible torsion zone that absorbs torque peaks and reduces breakage. The design includes extra grip ribs that grip the screw and reduce slipping (specific bits only).
These are tough quality, professional screwdriver bits.
DEWALT DT7245 Torsion Bit PH1 50mm Pack of 5