Features:
Made of 45# steel, solid and durable to use.
Good metal texture, comfortable surface, easy to clamp, so that the output torsion becomes larger.
Beautiful and practical design of the surface convex and concave, so that before and after the set can effectively cope with and can reduce the shaking jacket.
Self tightening keyless feature automatically increasing gripping force, high reliability, and stability.
Widely used with various drill machines, milling machines, lathes, boring lathes and electric hand tools.

Specifications:
Material: 45# steel
Accuracy: 0.002
Chuck Capacity: 1-16mm
Chuck External Diameter: 48mm / 1.89inch
Chuck Length: Approx. 100mm / 3.94inch
Arbor Type: MT2-JT3
Arbor Length: Approx. 115mm / 4.53inch
Total Length: Approx. 200mm / 7.87inch
Weight: Approx. 1168g

Package Included:
1 x Keyless Drill Chuck
1 x MT2-JT3 Arbor

Note:
1. Only things package included, no other stuff.
2. Please allow 1-2mm error due to manual measurement. Thanks for your understanding.