Features High-Quality Metal Casting: Cast by high-quality metal, this drill chuck is wear-resistant and anti-impact, ensuring durability and long-term use. Polished defence: The polishing features anti-oxidative, Water proof, and anti- properties, enhancing the chuck's longevity and performance. Fine Workmanship for Long Service Life: The fine and strict workmanship of this chuck ensures its long service life, providing reliability and consistent performance. Equipped with Chuck Key: Comes equipped with a chuck key for convenient and adjustment of the chuck tightness, ensuring secure and efficient . Versatile Application: Applicable for lathe, electric drill, milling machine, and more, making it a versatile tool for various applications. Features: 1、Cast by metal, wear resistant and anti-impact. 2、Polishing features anti-oxidative, Water proof and anti-. 3、Fine and strict workmanship ensures its long service life. 4、quipped with chuck key to adjust the chuck for proper tightness. 5、Applicable for lathe, electric drill, milling machine, etc. Specification: Features: 1. Cast by metal, wear resistant and anti-impact. 2. Polishing features anti-oxidative, Water proof and anti-. 3. Fine and strict workmanship ensures its long service life. 4. Equipped with chuck key to adjust the chuck for proper tightness. 5. Applicable for lathe, electric drill, milling machine, etc. Specification: Material: Metal Color: Shown ad pictures Clamping Range: 0.3-4mm Outer Diameter: 21.5mm/0.85in Brass Base Size: Length: 20mm/0.79in, Hole Diameter: 3.175mm/0.13in Weight: 72g/2.5oz Package list: 1 * JTO Chuck 1 * Chuck Key 1 * Brass Base 1 * Small Wrench Note: Please allow slight error due to manual measurement. Thanks for your understanding. Package List