Features:1. High accurate threaded and tapered tightly mounts on the tools.2. It can be protected form rusting for Cr-coated body and good appearance with sleeve electrophoretic enameling.3. By using anti-thrust bearing to convert key-applied torsion into superior gripping and anti bounce force.4. Jaws are specifically engineered for tight tolerance production drilling.5. It is stable and has great performance while using.Specification:Condition: 100% Brand NewItem Type: Drill ChuckClamp Size: 1.5 ~ 10mm / 0.06 ~ 0.39in Mount: 3/8-24UNF Size: As shown in the picture.Package List:1 * Drill Chuck 1.5-10mm 3/8-24UNF1 * 1/4 Hex Head 3/8 Thread Extension Rod1 * Chuck WrenchNote: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.