Feature:1. The chuck is self‑locking, and the clamping force is large, which is convenient for locking and prevents the bit from slipping.2. The clamping range is 1‑13mm, the clamping force is strong, and the practicability is strong.3. The internal screw rod is designed with T‑shaped teeth to increase the strength and increase the service life by 30%.4. The exterior adopts bluing process, high temperature resistance, and has good oxidation resistance.5. This chuck is mainly used for clamping drill bits, and is often installed on small bench drills or electric hand drills.Specification:Item Type: Drill ChuckMaterial: 40CrPurpose: Clamping drill bits or tapsHardness: 45-48HRCAccuracy: 0.08mmClamping Range: Approx. 1-13mm / 0.04-0.5in Package List:1 x Drill Chuck