Bull Bits PH2 150mm Impact Duty Screwdriver Drill Driver BitsThe BULL BITS PH2 Impact Screwdriver Driver Bits Set is a type of screwdriver bit set that is specifically designed for use with impact drivers, which are tools that use rotational force and torque to drive screws and other fasteners into materials. The PH2 bits in the set are typically made of a durable and hard wearing material such as hardened S2 steel, and are designed to withstand the high torque and vibration of an impact driver. They are