Features EXQUISITE TECHNOLOGY: The drill chuck technology is solid, strong and , special treatment of the claw, with good wear resistance ACCURATE FORMING: Drill chuck is well made, possess high accuracy, shell gear and key gear cold press forming RELIABLE AND : Drill chuck is easy to use, shell, keyhole, key after quenching, accurate and reliable, SOLID ALLOY: The drill chuck adopts excellent alloy material, possess high strength, high thermal strength, good corrosion resistance, good low temperature performance TECHNICAL PARAMETERS: Connecting size of wrench drill chuck is 1/2‑20UNF, clamping range from 1.5‑13mm, very practical Spec: Item Type: Drill Chuck Material: Alloy Connection Size: 1/2-20UNF Clamping Range: 1.5-13mm How to Use: Screw on the drill bit. PackageList: 1 x Drill Chuck 1 x Accessory Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1 x Drill Chuck 1 x Accessory