ApplicationGeneral lathe, economical CNC lathes, grinding machines, milling machines, drilling and machine accessories etc..Specification- Material:Hardened Steel - Model: K11-160 - Max RPM: 3600 r/min - Jaw: 3 Jaw - High precision: ≤0.05mm - Color: Silver - Mounting Thread: 3-M8 - Lathe Chuck: Diameter: 160mm(6.299\") Thickness: 65mm(2.559) Center Hole: 45mm(1.772) Bolt Circle Diameter: 142mm(5.591) Runout: 0.08mm(0.003\") Internal clamping range: 3-55 mm (0.12\"-2.17\"). Internal Jamming range: 50-160 mm (1.97\"-6.3\"). External clamping range: 55-145 mm (2.17\"-5.7\") - Package Includes: 1 X 160 mm/6 Inch Lathe Chuck Body 3 X Internal Jaws 3 X External Jaws 3 X Mounting Bolts 1 X Safety Chuck KeyNotePlease feel free to contact us for whatever we can help.