3888/4/1 K Rapidaptor Universal Bit Holder, stainless, 1/4", x 50 mmUniversal holder for the take-up of bits with hexagon head drive as per DIN ISO 1173-C 6.3 (ISO 1173). Stainless design to prevent extraneous rust. Comes with Rapidaptor technology, which 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 - for rapid bit change with just one hand. hexagon, suitable for power screwdrivers with take-up as per DIN ISO 1173-F 6.3.