HSS SQUARE TOOL BITS T1,M2,M35 1.professional manufacturer 2.pass iso 9001 3.oem T1,M2,M35 HSS SQUARE TOOLS BIT T1 ... : 150mm/200mm/300mmMaterial: T1, M2 and super-hard materialApplication: Universal Hss Square Tools Bits are both suitable for cutting metal materials ... material is used for cutting material that of high-hardness HSS SQUARE TOOL BITS T1,M2,M35