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