Wera Tools - 897/4 IMP R Impaktor holder with retaining ring and ring magnetWera Impaktor holder for the absorption of impulse peaks. Particular torsion effect thanks to the double torsion spring. The Impaktor holder additionally holds long and heavy screws extremely securely with its ring magnet. This enables rapid and dependable positioning of the screw. Should, situation related, the magnet not be desired e. g. when working with metal, it can be removed from the screwdriving zone and thereby be neutralised. Used mostly for