1. FLEXIBLE AND HIGH STRENGTH: The spring collet chuck is made of excellent hard alloy after heat treatment and cold drawing and hardening, the strength is relatively high and has a certain flexibility and plasticity 2. FATIGUE LIMIT: the fatigue limit of the collet chuck is comparable to that of a multi-color alloy spring under the same conditions of and full quenching 3. STRONG CHUCK: The collet chuck has hardness, wear resistance, strength and high toughness, as well as heat resistance, corrosion resistance and a series of excellent properties 4. APPLICABLE SCNARIO: Collet chuck is widely used in milling, boring, drilling, tapping, CNC, engraving, spindle machine and other processing operations, CNC, machining center, tapping machine, drilling machine, milling machine and other equipment operations 5. WITH BOX: The spring collet is equipped with a storage box for easy storage, portability and access, and also prevents damage and loss Specification: Item Type: Spring Collet Chuck. Material: Carbide Package List: 1 x Spring Chuck 1 x Storage Box.