... , wrench, grinding wheel, diamond 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, ... Length(l)Overall Length(L)2D×2×4×50L224503D×3×6×50L336504D×4×8×50L448505D×5×10×50L5510506D× ... 12×20×100L121220100 Carbide Fixed-point Drill Bits