2.Material: 40Cr
3.Hardness: HRC48-52
4.Accuracy: 0.005mm
5.Package: Plastic box
6.Type: BT30 BT40 BT50
7.Balanced:G6.3/12000rpm G2.5/20000rpm
8.Standard form: AD AD/B
9.According to needs to be possible to provide the balanced hilt,the standard precision is G6.3/12000rpm.the precise precision is G2.5/20000rpm.