K11-100 Chuck 6 Inch 3-Jaw Self-Centering Lathe Chuck With 1 1/2 In-8 Threaded Backing Plate 100mm Lathe Chuck K11-200 Universal Self-Centering Manual Chuck 3 Jaw Self Centering Chuck Selfcentering Lathe Chuck 3 Jaw Chuck 4 Inch 3 Jaw Self Centering Lathe Chuck Fit for CNC Drilling Milling Machine : : Industrial & Scientific Lathe Chuck: Diameter: 100 mm (3.94") Center Hole: 22 mm (0.866") Thickness: 55 mm (2.16") Bolt Circle Diameter: 84 mm (3.31") Runout: 0.002" Internal Jaw Clamping Range (A-A1): 2-30 mm (0.078"-1.18") Internal Jaw Jamming Range (B-B1 4-Jaw Independent Lathe Chucks, Plain Back. Accusize Industrial Tools. SKU: 0557-0003. 5.0 ( 2 Reviews ). Diameter of the chuck: 3/75mm Lathe Chuck: Diameter: 100 mm (3., 94) Center Hole: 22 mm (0., 866) Thickness: 55 mm (2., 16) Bolt Circle Diameter: 84 mm (3., 31) Runout: 0., 002 Internal Jaw Clamping Range (A-A1): 2-30 mm (0., 078-1., 18) Internal Jaw Jamming Range (B-B1): 30-90 mm (1., 18-3., 54) External Jaw Clamping Range (C-C1): 30-80 mm (1., 18-3., 15) Package Includes: 1 X 100 mm/4 Inch Lathe Chuck Body 3 X Internal Jaws 3 X External Jaws 3 X Mounting Bolts 1 X Chuck Key, Size: 100 mm (3., 94) , Jaw: 3 Jaw , Model: K11-100 , Color: Silver , Material:Hardened Steel