Straight major cutting edges and a special flute profile ensure good chip evacuation.. Pro Steel Solid Carbide Drill, 19 mm Dia, 140 Deg Point Angle, TiAlN Coated, Through-Coolant Standard: DIN 6537 K Tolerance nominal dia : h7 Number of cutting edges Z: 2 Tolerance nominal dia : h7 recommended maximum drilling depth L2: 50. The robust cutter geometry ensures high-performance drilling with good process reliability.