Features 1、4 Jaw Wood Lathe Chuck: Made of 1045 steel, equipped with 12.9 grade alloy steel screws, providing greater durability, higher strength, and longer lifespan. Rust and erosion resistant surface ensures extended longevity. 2、High Accuracy and Efficiency: This 4 inch self centering chuck with 4 jaws features high accuracy and efficiency. The self centering function automatically corrects the machining center position, ensuring workpiece accuracy and stability, improving machining efficiency and quality. 3、Compatibility and Versatility: Woodworking lathe chuck is compatible with 1in x 8tpi threaded lathes and 3/4in x 16tpi threaded lathes with adapters. 4、Steel Construction: Constructed with 1045 steel, this wood lathe chuck has a minimum supporting diameter of 43.5mm/1.71in, maximum support of 85mm/3.35in, and a minimum grip of 58.5mm/2.3in, maximum grip of 102mm/4.02in, providing sturdy and reliable performance. 5、Wide Range of Applications: The 4 jaw wood lathe chuck is widely used in woodworking and mechanical processing. Compatible with most wood lathes, especially for CXRCY wood lathes, it can securely grip wooden materials to meet various requirements. Specification Item Type: 4 Jaw Self Centering Chuck Set Material: 1045 Steel Chuck Closure Ranges: Approx. 43.5 to 58.5mm / 1.71 to 2.3in Chuck Expansion Ranges: Approx. 85 to 102mm / 3.35 to 4.02in Package List 1 x Lathe Chuck 1 x Shaft 1 x Screw Chuck 1 x T Shaped Hex Wrench 2 x Tightening Arm Wrench