The wera 875567 9imp dc bit check pozi torx 9 piece set has an impaktor holder with retaining ringmagnet in the chuck for a secure fit of the bits in the holder and 9 25mm long impaktor bits the impaktor technology ensures an above average service life even under extreme conditions thanks to a best possible utilisation of the material properties and optimally designed geometry particularly suitable for use with conventional impact drivers holder equipped with a ring magnet to easily hold longer