Features:_x000D__x000D_Good metal texture, comfortable surface, easy to clamp, so that the output torsion becomes larger. _x000D_The unique thrust bearing facilitates the application of torsion by the handle into a greater clamping force. _x000D_Clamping force of this self-tightening chuck would increase according to required force. _x000D_Keyless design, tightening and loosening is by hand force, which offers a quicker and easier chucking and unchucking. _x000D_Widely used with various drill machines, milling machines, lathes, boring lathes and electric hand tools._x000D__x000D__x000D__x000D_Specifications: _x000D_Material: 45# steel _x000D_Chuck Capacity: 1-13mm(1/2") / 0.04-0.5in_x000D_Chuck Inner Diameter: Approx. 15.733mm / 0.6in_x000D_Chuck Out Diameter: Approx. 40mm / 1.57in_x000D_Chuck Length: Approx. 88mm / 3.46in_x000D_Arbor Type: MT2-B16 _x000D__x000D__x000D_Package Includes: _x000D_1 x Chuck & Arbor _x000D__x000D__x000D_Note:_x000D_Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering 1Good metal texture, comfortable surface, easy to clamp, so that the output torsion becomes larger 2The unique thrust bearing facilitates the application of torsion by the handle into a greater clamping force 3Clamping force of this self-tightening chuck would increase according to required force 4Keyless design, tightening and loosening is by hand force, which offers a quicker and easier chucking and unchucking 5Widely used with various drill machines, milling machines, lathes, boring lathes and electric hand tools