899/4/1 Universal Bit Holder, 1/4", x 50 mmUniversal holder for the take-up of bits with hexagon head drive as per DIN ISO 1173-C 6.3. Stainless steel sleeve for very special corrosion protection. The retaining ring ensures an optimum fit of the tool in the holder. The strong permanent magnet holds the bits absolutely securely. hexagonal, suitable for power screwdrivers with take-up as per DIN ISO 1173-F 6.3.