1、Made of high quality steel with high hardness, wearproof, firm and durable. 2、Compact with small volume, easy to use. 3、With high centering precision as well as a large clamping range. 4、The chucks have two mounting types: the short cylindrical center mounting and the thread mounting. 5、Mainly used for machine tools in the processing of non-ferrous metals and non-metals. Description: The Scroll Chuck is an industrial product with automatic centering. It is mainly used for machine tools in the processing of non-ferrous metals and non-metals. Features: 1. Made of high quality steel with high hardness, wearproof, firm and durable. 2. Compact with small volume, easy to use. 3. With high centering precision as well as a large clamping range. 4. The chucks have two mounting types: the short cylindrical center mounting and the thread mounting. 5. Mainly used for machine tools in the processing of non-ferrous metals and non-metals. Specifications: Material: steel Model: K01-50 Chuck diameter: 50mm/1.97in Weight: Approx. 522g Package Includes: 1 x Chuck 2 x Screw Rod Note: Please allow small deviation due to manual measurement. Thanks for your understanding.