897/4 R SB Rapidaptor BiTorsion Universal Bit Holder, 1/4", x 75 mmUniversal holder for bits with hexagon head drive as per DIN ISO 1173-C 6.3 and E 6.3 (ISO 1173). BiTorsion holders by Wera have a torsion spring that absorbs low peak loads during screwdriving jobs. The combined use with BiTorsion bits and their torsion zones extends the service life of the tool considerably. BiTorsion holders by Wera can, however, also be used with conventional bits. The Rapidaptor technology allows bits to be attached without any need to actuate the sleeve. The removal of the bit is simple, just by pushing the sleeve forward. This enables rapid bit change with just one hand. hexagonal, suitable for power screwdrivers with take-up as per DIN ISO 1173-F 6.3.