... tools, 2Flute-4Flute; High quality of wearability and impact1. Micrograin carbide rod: Grain size: 0.5,0.6, ... measuring and inspection machine. 5. We accept the specification as your requirement. 6. Work Piece: Carbon steel, alloy steel, ... cast steel, tooling steel, mould steel, heat-treament steel. Aluminum alloy steel, Non ferrous alloy, solid carbide twist drill bit for aluminum alloy ...