Super High Precision Morse Taper MT2 Shank Revolving Live Centre with M14 x 1 thread- Runout within 0.01 mm Includes a 50 mm 3 Jaws Self Centering Chuck. Body of the Chuck is Caste Iron & Jaws are made of Hard Tool Steel. Revolving Center's Mounted Threaded Portion Hardened for a long thread life- Hardness 40-42 HRC. Body of the Revolving Live center is made of EN8D grade of Tool Steel. Has 2 Ball & 1 Taper Bearing Inside for Radial Thrust.