Impaktor holder with retaining ring and ring magnet in the chuck for a secure fit of the bits in the holder, 9 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 and heavier screws, also ideal for above-head work. The rough diamond coating of the bits reduces the danger of any slipping out of the screw head due to the enhanced frictional resistance