Feature: 1. High accuracy thread and tapered holes can be tightly attached to the tool. 2. The housing is treated with electrophoretic paint, making the product anti-rust even in worst environment. 3. By using special anti-thrust bearing to convert key-applied torsion into superior gripping. 4. The clamping jaws are specially treated to improve wear resistance. 5. Enjoying super accuracy and durability. 1.5-13mm 3/8-24UNF: 1.5-13mm denotes that clamp the drill between 1.5 and 13mm, and 3/8-24UNF represents a screw hole with 3/8-24UNF at the back of the chuck. Spec: Condition: 100% Brand New Material: Stainless steel Clamping Range: 1.5-13mm / 0.06-0.51in Package list: 1 * 1.5-13MM 3/8--24UNF Drill Chuck 1 * Key 1 * 1/4 Hex 3/8 Threaded Extension Rod