Feature 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.SpecificationItem Type: Collet ChuckMaterial: Cemented Carbide .wang-edit-text{ font-family:'Arial' important } .wang-edit-text table { border-top: 1px solid 000 border-left: 1px solid 000 } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000 border-right: 1px solid 000 padding: 3px 5px } .wang-edit-text table th { text-align: center }Package List1 x Collet Chuck1 x Storage Box"