ZJchao 15pcs Er25 Spring Collet Set Gripping Range From 2mm to 16mm for CNC Engraving Machine or Milling Lathe Tool Material:High Grade 1065 Carbon Steel Run-Out Tolerance:0.015MM(0.0006") 100% working condition & 100% customer satisfaction We've had a customer satisfaction guarantee for a long time, So Just go for it 15 pcs ER25 Spring Collet(2mm,3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm,13mm,14mm,15mm,16mm)