2.Material: High quality spring steel 40CR
3.Hardness : HRC48-52
4.Accuracy: AA grade(0.005)mm
5.Type : ER11M ER20M ER25M ER11A ER16A ER20A ER16UM ER20UM ER25UM ER32UM ER40UM
6.Default balancing G6.3 12000rpm,18000rpm
7.Brand : HT-TOOLS
8.Package : Plastic box paper box
9.Mini order quantity : 10pcs