Jaws are made of tool steel, hardened & ground. Body is made of graded cast iron. Shank Size : 4 MT / MT4 / Morse Taper 4. Guarantees A Smooth Movement With Accurate Concentricity.SET INCLUDES : 3 JAW 2 50mm CHUCK + MT-4 Revolving Live Center. This item is in the category "Business, Office & Industrial\CNC, Metalworking & Manufacturing\Metalworking Equipment\Metalworking Lathes". The seller is "gurunanak_international" and is located in this country: IN. This item can be shipped worldwide.