Feature:1. Application: This is a drill chuck that can be widely used in lathes, electric drills, milling machines, etc.2. Surface Polishing: This mini drill chuck adopts surface polishing technology, which is oxidation resistance, waterproof and prevent corrosion.3. Own Chuck Key: The drill chuck comes with a chuck key, which can adjust the tightness of the chuck and is easy to install and operate.4. Carbon Steel + Brass: The chuck is made of high quality carbon steel and brass, strong, impact resistance and long service life.5. Quick Switching: The drill chuck is easier and safer to install in the power tool and quickly switch between different tasks.Specification:Item Type: Micro Motor Drill ChuckMaterial: Carbon Steel + BrassUses: Suitable for Lathes, Electric Drills, Milling Machines, etc.Clamping Range of Drill Chuck: Approx. 0.3-4mm / 0.01-0.16inOuter Diameter of Drill Chuck: Approx. 21.5mm / 0.85inAperture of Shaft Connecting Rod: 1/8in.Package List:1 x Drill Chuck1 x Shaft Connecting Rod2 x Wrench2 x Screw