1 Impact driver Holder with snap ring and ring magnet at holder fixture for secure fit of Bit in holder, 9 Impact driver Bits. Impactor technology ensures optimum utilisation of the material properties and geometry optimally adapted for above-average service life even under extreme conditions; Holder with ring magnet for simple holding during longer and difficult screw tightening work perfectly suited for over-the-head working. The rough diamond coating of the bits increases frictional resistance and thereby helps to prevent the screw from slipping out. Bit-Check made of robust plastic for long life. Easy to transport, for example in a shirt pocket. One-handed bit removal.