... tool, thread tap, ball nose, twist drill, HSS tool bits, PCD diamond insert, gear hob,....Carbide Fixed-point Drill Bits 1, Suitable for Mould steel, Cast ... iron, Aluminum alloy, Copper, and Alloy steel processing. 2, Mainly for fixing point and ... ×16×100L881610010D×10×20×100L10102010012D×12×20×100L121220100 Carbide Fixed-point Drill Bits