Feature:1. Firm in Clamping: Ensuring firm clamping with good elasticity, this spring collet will largely improve both working efficiency and performance.2. Practical to Use: Widely used on the ER spindle of machining center, accuracy engraving machine and various engraving machines, very useful.3. Reliable Working: The cooling water in the milling cutter can directly cool the milling cutter during processing ensure the blade stability.4. Fine Workmanship: Having been through fine grinding and quenching, the cemented carbide material is not easy to deform or crack, very reliable.5. Great Durability: Comes with low temperature impact toughness, the spring collet chuck also has excellent durability for long term using.Specification:Item Type: Collet ChuckMaterial: Cemented Carbide.Package List:1 xCollet Chuck1 x Storage Box