Lathe Chuck K72-125 5' 4 Jaw Independent Milling Machine Cast Iron Internal Jaw Quality Cast Iron 4 Reversible Jaws With Great Accuracy Independent Jaws Easy to Operate Wide Application Pinions Material: 20CR Steel,Package Dimensions (L x W x H): 5.9' x 5.5' x 3.93' / 15 x 14 x 10 cm,Color: Silver,Maximum Speed: 3000 RPM,Tolerance: 0.003' / 0.07 mm,Chuck Diameter: 4.92' / 125 mm,Jaws Material: 40CR Steel,Center Hole: 1.2' / 30 mm,External Jaw Clamping Range: 1.89'-4.92' / 48-125 mm,Bevel Gear Material: 40CR Steel,Accuracy: 0.002' / 0.051 mm,Chuck Body Material: Cast Iron,Circle Diameter: 4.3' / 108 mm,Internal Jaw Clamping Range: 0.276'-2.244' / 7-57 mm,Item Weight: 10.9 lbs / 4.92 kg