Feature: It is made of high quality and high hardness manganese steel, which has high hardness and is not easy to corrode. High precision, suitable for high precision machining and long service life. The method of use is simple, practical, and has a firm connection performance. With drill chuck, can be used as a spare drill chuck handle. Can be adapted to a variety of drilling machines, milling machines, rocker shafts, lathe tailstocks and so on. Spezifikations:Condition: 100% Brand NewMaterial: manganese steelStandard: MT3B16Size:Connecting rod maximum diameter: approx. 23.825mm / 0.9inShort head maximum diameter: approx. 15.733mm / 0.6inPackage list:1 * Drill Chuck Arbor