with cross-point AC short, right-hand cutting, with cylindrical shank, precision-ground twist drill in industrial quality for drilling alloyed and unalloyed steels, gray cast iron, malleable cast iron, copper alloy, nickel silver, graphite, sintered iron, wide grooves and reinforced core are the main features, this enables a drilling depth, almost Corresponding to the helix length and good chip evacuation, point angle 118 °, surface blued from 1.0 mm, all dimensions from 4.0 mm with special grind "AC", industrial quality suitable for NC machines, precise thanks to modern grinding process, break-resistant thanks to CNC-controlled Heat treatment