Wera 1/4" bit holder Impaktor

897/4 IMP R SB. The Impaktor is a 1/4" drive bit holder that cushions impact pulses of hard hitting impact screwdrivers by means of a double torsion spring and an additional steel torsion zone. It is equipped with a strong ring magnet, to securely hold screws. The magnet is held with a retaining ring and can be removed if desired. Overall length 75mm. Compatible with 1/4" drive DIN ISO 1173-C 6.3 bits.