elastic steel ER Collet 1.Material: 60Mn 2.Accuracy:0.005mm 3.Power ... tapping, grinding and engraving operation etc.5.Models: ER8, ER11,ER16,ER20,ER25,ER32,ER40,ER50.6.Packing: inner packing is ... suplly various machinery accessories such as Er collet, Sealed collet, Tap collet, R8 collet, 5C dollet, OZ collet, tool holder etc.If you need more ... to contact us.skype id: rosewicker elastic steel ER Collet