1It is made of high quality and high hardness manganese steel, which has high hardness and is not easy to corrode 2High precision, suitable for high precision machining and long service life 3The method of use is simple, practical, and has a firm connection performance 4With drill chuck, can be used as a spare drill chuck handle 5Can be adapted to a variety of drilling machines, milling machines, rocker shafts, lathe tailstocks and so on
