1.DURABLE MATERIALS: This 3 piece internal collet chuck is made from durable materials to ensure longevity and reliability. It is specifically designed for heavy duty applications in metalworking, providing long term reliable performance 2.AUTOMATIC CENTERING FUNCTION: The internal collet chuck is equipped with an automatic centering mechanism, enabling precise and accurate machining. It ensures the workpiece is automatically centered, making it easier to achieve uniform results 3.MULTI FUNCTIONAL METAL LATHE TOOL: The internal jaw chuck is an indispensable tool in metalworking. It expands the functionality of metal lathes, enabling a wider range of applications, making it a valuable addition to any workshop 4.SHORT CYLINDRICAL CENTER MOUNTING: This self centering chuck features a short cylindrical center mounting design, providing stability and ensuring the chuck remains securely fixed during operation, thereby enhancing overall precision