Features Features: The unique thrust bearing facilitates the application by the handle into a greater clamping force Clamping force of this self-tightening chuck would increase according to required force Key-less 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 Features: Good metal texture, comfortable surface, easy to clamp, so that the output becomes larger. Clamping force of this self-tightening chuck would increase according to required force. Key-less 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: Material: 45# steel Chuck Capacity: 1-13mm(1/2") Chuck Inner Diameter: 15.733mm(0.61") Chuck Out Diameter: 40mm(1.57") Chuck Length: 88mm(3.46") Arbor Type: MT2-B16 Package Includes: 1 x Chuck & Arbor Package List