[Material] It is made of durable bearing steel with hardness of HRC60.[Heavy drill chuck] including 5 or 8 inch drill chuck, 2 Morse tapered shaft and jaw tightening key.[ Conical ] 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 or 8 inch - 5 or 8 inch or up to 5 or 8 inch) drill bits, with accuracy of 0 inch.Material: bearing steelColor as shownPackage Contents:1 x B18 drill chuck1 x mt2 post1 x key wrenchOnly 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.