*Premium Quality: The Chuck body is made of quality steel. All guideways and bearing surfaces are precisely machined for better performance. It has high strength and toughness, compression resistance and durability, and long service life. *High Performance Jaws: The chuck jaw is made of Hardened steel. 4 inches each jaw can be adjusted to center with superior gripping force, which improves chucks flexibility, clamping most shaped workpieces can also be realized. Round Claw Clamping Range: 2""/55 - 4""/100 mm. Round Claw Support Range: 3.4""/71 - 4.8""/121 mm. *Precision Highly Polishing: With smooth surface, the lathe chuck is milled by pricing milling skill for high precision and accuracy. Our jaw lathe chuck has an automatic centering function, so it does not need to be repeatedly calibrated during installation. *Complete Accessories: This complete lathe chuck set include two jaws set and a set of installation tools, two deformation sleeves, which bring much convenience to your operation. *Wide Application: Applicable to the general lathe, grinder, milling machine, drilling machine and machine accessories, woodworking machinery accessories and other machine tools and accessories. *Specifications Material: Steel Chuck Diameter: 4 inch / 100 mm Case Dimensions: 17 x 11 x 4 inch / 43.5 x 28 x 11 cm Item Weight: 15.6 lbs / 7 kg Spindle Thread: 1"" x 8TPI Taper Adaptor & M33 x 3.5 Taper Adaptor *Pakcage Content 1 x Lathe Chuck 3 x Replaceable Jaws 1 x Chuck Key 1 x Wrench 1 x Allen Key 1 x Wood Screw 1 x Gear Key 1 x Tool Case