Conical part is made from high speed steel, main body part is made from 40Cr steel, quenching hardness 45 to 50 HRC. The 60 center runs in its own high speed bearings and is used at the non-driven or tailstock end of a machine. Dust proof seal preventing cutting dust enter into bearing thus prolong service time. Designed for high speed lathe and CNC lathe to achieve high precision. Well balanced and Glossy for effective turning. Colour: silver + black Material: high-speed steel Package Contents: 1 * MK2 live broadcast center 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.