Ø D 3,5 mm L 70 mm l1 31 mm l 18 mm Weight 0,005 kg Even Teeth 6 Points Material efficient high-speed steel HSS. Left hand helix 7° with uniform spacing. Usage Machine reaming of holes in ferrous and non-ferrous metals, their alloys and plastics. Manufacturing Mode V - ground from solid Surface Treatment without treatment Ø d h9 3,5 mm Tolerance H7