1[Drill Chuck Arbor Kit] This is a 1 to 10mm B12 self tighten drill chuck, equipped with an MT2 to B12 arbor, making it convenient for connecting to the device. 2[High Clamp Force] The clamping force of this self tighten drill chuck will increase according to the required force, the unique thrust bearing aids handle torsion for maximum clamping force. 3[Keyless Design] With a keyless design, this hand drill chuck allows for quick and effortless tightening and loosening using hand strength, enhancing ease of use. 4[Superior Performance] Constructed from high carbon steel, this self tighten drill chuck has high strength, providing high efficiency while ensuring long term dependable use. 5[Wide Application] This drill chuck can be widely used in various drilling machines, milling machines, lathes, boring machines, and electric manual tools. 1 x Drill Chuck 1 x Arbor 1 x Storage Box