Tool specially matched to drilling holes without through-coolant.9 mm Dia, 140 Deg Point Angle, AlTiN-Si Coated, Plain Shank Through-coolant: no Standard: DIN 6537 Tolerance nominal dia : m7 Number of cutting edges Z: 2 Tolerance nominal dia : m7 recommended maximum drilling depth L2: 42.Flute length LC = L2 + 1.5 x DC.