Features Enhanced Clamping Power: Experience superior torque output with a robust metal texture that ensures a secure grip and comfortable handling Innovative Bearing Design: The unique bearing mechanism amplifies torque application, resulting in superior clamping force for your projects Adaptive Clamping Force: This self-tightening design automatically increases clamping force based on the required pressure, enhancing efficiency Quick and Easy Operation: Utilize hand force for tightening and loosening, allowing for faster and more convenient chucking and unchucking Versatile Compatibility: Ideal for use with various machines including drill machines, milling machines, lathes, and electric hand tools Features: 1、Good metal texture, comfortable , easy to clamp, so that the output torque becomes larger 2、The unique th bearing facilitates the application of torque by the handle into a greater clamping force 3、Clamping force of this self-tightening chuck would increase according to required force 4、Keyl design, tightening and loosening is by hand force, which offers a quicker and easier chucking and unchucking 5、Widely used with various drill machines, milling machines, lathes, boring lathes and electric hand tools Specification: Features: Good metal texture, comfortable , easy to clamp, so that the output torque becomes larger. The unique th bearing facilitates the application of torque by the handle into a greater clamping force. Clamping force of this self-tightening chuck would increase according to required force. Keyl 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. Specification: Type: B16 Material: 45# steel Capacity: 0-1m(1/2") Inner Diameter: 15.7(0.61") Out Diameter: 40mm(1.57") Length: 88mm(3.46") Package Includes: 1 x Chuck Package List