It is made of high quality and hard steel, which has high hardness and is not easy to corrode High precision, suitable for high precision machining, and long life of life; With drill head, can be used as a spare drill handle The method of use is simple, convenient, and has strong connection performance Can be adapted to a variety of drilling machines, milling machines, drop welding, turning heads, etc Features: Yeuri It is made of hard manganese steel of high quality, which has high hardness and is not easy to corrode. High precision, suitable for high precision operations and long service life. The method of use is simple, convenient, and has solid connection performance. With drill head, usable as spare chuck handle. Can be adapted to a variety of drilling machines, milling machines, rocker shafts, lathe spare heads and so on. Specifications: Condition: New Material: manganese steel Standard: MT3-B16 Quantity delivered: 1 piece