Wera 05052490001 887/4 1/4'' Hex RR Rapidaptor Universal Bit Holder w/ Ring Magnet comes with hexagon head drive as per DIN ISO 1173-C 6.3 and E 6.3 (ISO 1173). The floating, free-turning magnetic sleeve securely holds even large and heavy screws. The Rapidaptor 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. Wera 887/4 1/4'' Hex RR Rapidaptor Universal Bit Holder With Ring Magnet is suitable for power screwdrivers with take-up as per DIN ISO 1173-F 6.3.