*KeyFeatures *Premium Material: Diameter: 4.92" / 125 mm; Clamping Range:0.098"-4.33" / 2.5-110 mm; Jamming Range: 1.5"-4.92" / 38-125 mm. The self-centering lathe chuck body is made of quality cast iron that is strong and durable. Several rigorous quality tests have proved that. *Internal & External Jaws: The 3-jaw lathe chuck comes with two sets of jawsinside and outside onesto extend its holding range, and therefore allows you to handle a wide variety of stock sizes. *High Precision: The self-centering lathe part contains a delicate bevel gear and three pinion gears. They contribute to precise processing progress, bearing tolerance of 0.002in / 0.05 mm. *High Efficiency: The mini lathe chuck is easy to use by turning the ergonomic T chuck key (included in the package). Since the changeover and setting time is cut, your lathe can work with higher efficiency. *Diversified Application: The metal lathe chuck is widely applied to metal lathes for the general turning of shafts and some more delicate materials. It would be the perfect choice for your lathe machine. ******************************************************************************************************* *Specifications Chuck Body Material: Cast Iron Jaws Material: 40CR Steel Bevel Gear Material: 40CR Steel Pinions Material: 20CR Steel Item Diameter: 4.92" / 125 mm Bolt Circle Diameter: 4.25" / 108 mm Center Hole Diameter: 1.18" / 30 mm Internal Jaw Clamping Range (A-A1): 0.098"-1.57" / 2.5-40 mm Internal Jaw Jamming Range (B-B1): 1.5"-4.92" / 38-125 mm External Jaw Clamping Range (C-C1): 1.5"-4.33" / 38-110 mm Chuck Body Thickness: 2.28" / 58 mm Mounting Thread: 3-M8 Item Weight: 11.2 lbs / 5.08 kg Package Dimensions: 6.3" x 6.3" x 5.9" / 16 x 16 x 15 cm ******************************************************************************************************* *Pakcage Content 1 x Lathe Chuck Body 3 x Internal Jaws 3 x External Jaws 3 x Mounting Bolts 1 x Chuck Key