Features Material Durability: Constructed from high-quality 45# steel, this chuck offers exceptional durability and resistant to wear. Its robust build guarantees a long-lasting tool performance, making it a vital component for drills, milling machines, lathes, and other electric hand tools used in demanding work environments. Superior Torques Application: The built-in unique thrust bearing in this chuck significantly improves the translation of torques applied by the handle into greater clamping force. This innovative feature is especially beneficial in tasks requiring high precisioned and strength, enhancing the tool's overall performance and reliability. Optimized Dimensional Accuracy: This product is meticulously designed with precise dimension, featuring an inner diameter of 15.733mm and an outer diameter of 40mm. Its total length of 88mm ensures it fits appropriately in the intended machinery, allowing for enhanced operational efficiency and ease of installation. Enhanced Clamping Efficiency: Featuring a keyless design, this B16 chuck ensures easy operation with its hand-tightening mechanism, allowing for quicker and more convenient chucking and unchucking. The absence of a key adds to the seamless functionality, catering to various machining needs without the hassle of losing accessories. Versatile Tool Compatibility: With a capacity ranging from 0-13mm and compatibility across various devices, this chuck provides a flexible solution for different machining operations. Whether used in lathes, boring machines or electrical hand tools, its versatility ensures a high level of adaptability to multiple platforms. Features: Good metal texture, comfortable, easy to clamp, so that the output torques becomes larger. The unique thrust bearing facilitates the application of torques by the handle into a greater clamping force. Clamping force of this self-tightening chuck would increase according to required force. Keyless design, tightening and loosening is by hand force, which offers a quicker and easier chucking and unchucking. Widely used with various drill machines, milling machines, lathes, boring lathes and electric hand tools. Specifications: Type: B16 Material: 45# steel Capacity: 0-13mm(1/2) Inner Diameter: 15.733mm(0.61) Out Diameter: 40mm(1.57) Length: 88mm(3.46) Package Includes: 1 x Chuck Package List