The Bosch PZ2 25mm Impact Screwdriver Bits are highly robust and can even be used with impact drivers. Each bit is made from S2 Modified Steel and an optimised heat-treatment process that provides an extra-hard quality for a strong performance. Extended torsion zone for extreme sturdiness in long-lasting work. Suitable for use with Hex shank for maximum power transfer in standard three-jaw drills and hexagonal impact driver chucks.