Features:1. High accuracy threaded and tapered tightly mounts on the tools.2. The chuck can be protected from rusting for Cr-coated body and good appearance with electrophoretic enamelling.3. By using anti-thrust bearing to convert key-applied torsion into superior gripping and anti bounce force.4. The jaws was specially treated for better wear resistance.5. It is stable and has great performance while using.Specification:Condition: 100% Brand NewItem Type: Drill ChuckClamp Size: 0.6 ~ 6mm / 0.02 ~ 0.24in Mount: 3/8-24UNFSize: As shown in the picturePackage List:1 * Drill Chuck 0.6-6MM 3/8-24UNF1 * 1/4 Hex Head 3/8 Thread Extension Rod1 * Chuck WrenchNotice:1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.