Converts 1/4in. Hex driver to 1/4in. square drive., Suitable for 1/4 Inch hex bits under DIN 3126-C 6,3 and E 6,3, ISO 1173. Quick-release chuck for fast bit changeschromium vanadium . Constructed from chromium vanadium, Rozmiar napędu = 1/4 in, Typ = Ada