... Bits : 1.Material: M42, M35, F4341, 4241, 9341, 6542 2.Hardness:HRC80~82 3.Type: Square, Flat,Round Bits ... Lathe Tool Bits . All kind of material together with square, ... M2 and super-hard materialApplication:Universal Hss Square Tools Bits are both suitable for cutting metal materials and ... 66xxxxx88xxxxx1010xxxxx1212xxxxx1616 xxx2020 xx2525 xx Lathe Tool Bits