[Material] It is made of durable bearing steel with hardness of HRC60. [Heavy drill chuck] including 5/8 inch drill chuck, # 2 Morse tapered shaft and jaw tightening key. [ Conical shank ] drill chuck can be installed on the headstock or tailstock of the headstock, and # 2MT accessories are acceptable. [Applicable] It is very suitable for placing drill bits, small turns, pins, pen spindles, etc. [Clamping range] It can accommodate 3-16 mm (1/8 inch - 5/8 inch/up to 5/8 inch) drill bits, with accuracy of 0 inch. Material: bearing steel Color as shown Package Contents: 1 x B18 drill chuck 1 x mt2 post 1 x key wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.