Yakamoz Micro 0.3-4mm JTO Taper Mounted Drill Chuck and Wrench with Chuck Key for Lathe Electric DrillFeature:Made of high quality metal, wear resistant and anti-impact.Polishing surface features anti-oxidative, waterproof and anti-corrosion.Fine and strict workmanship ensures its long service life.This JTO Chuck is quipped with chuck key to adjust the chuck for proper tightness.This JTO Taper Mounted Drill Chuck Set is Applicable for lathe, electric drill, milling machine, etc.Specification:Material: MetalClamping Range: 0.3-4mmOuter Diameter: 21.5mm/0.85inBrass Base Size: Length: 20mm/0.79inHole Diameter: 3.175mm/0.13inPackage Included:1 x JTO Chuck1 x Chuck Key1 x Brass Base1 x Small Wrench