12Pcs ER20 Spring Collet Set for CNC Engraving Machine Milling Lathe Chuck Tool Holder 1-12mm

Specification: Gripping Range - 1mm,2mm,3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm Application - Suitable for boring, milling, drilling, tapping, engraving, CNC, spindle machines, and other processing Premium Quality - These spring collets are made of high quality spring steel, they are stable and practical in performance. Accuracy?0.008mm Model Number: ER20 Material:Spring Steel 65Mn For CNC milling tool Engraving machine spindle motoru.Used for holding drills, boring tools, chisel, reamers and other tools. Feature: Clamping force, high accuracy, good stability and grip