Universal holder for mounting bits with 1/4" external hexagon drive as per DIN ISO 1173-C 6.3. Stainless steel sleeve for outstanding corrosion protection. The retaining ring guarantees optimal fit of the tool in the holder. The strong permanent magnet holds the bits firmly. 1/4" hexagon, suitable for screwdriver machines with mounting as per DIN ISO 1173-F 6.3.